猎鹰9号与猎鹰重型运载火箭发射任务列表 (2020年至2022年)

从2020年1月到2022年底，猎鹰9号成功发射了117次，所有发射均取得成功，其中111次任务的一级助推器成功回收。猎鹰重型发射了一次，也取得了成功，任务中的两个侧助推器也成功回收。 10 20 30 40 50 60 70 '20 '21 '22   猎鹰9号Block 5   猎鹰9号Block 5（复用）   獵鷹重型 10 20 30 40 50 60 70 '20 '21 '22   卡纳维拉尔角LC-40   肯尼迪LC-39A   范登堡SLC-4E 10 20 30 40 50 60 70 '20 '21 '22   发射成功 (商业和政府)   发射成功 (Starlink) 10 20 30 40 50 60 70 '20 '21 '22   海上驳船回收失败   陆地回收成功   海上驳船回收成功   未尝试 Falcon 9 first-stage boosters are designated with a construction serial number and an optional flight number when reused, e.g. B1041.1 and B1041.2 represent the two flights of booster B1041. 重复使用助推器的发射任务用回收符号♺表示。 旨在协助的宣传圣犹达儿童研究医院 Due to the huge no. of payloads rising on this mission, the actual total payload mass has not still being estimated. 远地点低于地球同步轨道的椭圆轨道 獵鷹9號一級推進器列表 龙飞船2号 星鏈發射列表 SpaceX星舰测试任务列表 SpaceX launches more Starlink satellites, tests design change for astronomers. spaceflightnow. 2020-01-07 [2022-01-29]. （原始内容存档于2020-01-07）.  引用错误：没有为名为SLNov19的参考文献提供内容 Clark, Stephen. Live coverage: SpaceX successfully performs Crew Dragon abort test. Spaceflight Now. [2020-05-31]. （原始内容存档于2020-01-17）.  Foust, Jeff. NASA and SpaceX Delay Dragon In-Flight Abort Test. SpaceNews. 2015-07-02 [2016-05-03].  Pietrobon, Steven. UNITED STATES SUBORBITAL LAUNCH MANIFEST (2020年1月18日). Steven Pietrobon's Space Archive. 2020-01-18 [2020-01-18]. （原始内容存档于2021-03-05）.  Boeing, SpaceX Secure Additional Crewed Missions Under NASA's Commercial Space Transport Program. 2017-01-04 [2017-03-07]. （原始内容存档于2018-12-22）.  SpaceX launches fourth batch of Starlink satellites, tweaks satellite design. 2020-01-29 [2020-01-31]. （原始内容存档于2024-02-23）.  SpaceX launches 60 Starlink satellites for new megaconstellation, misses rocket landing. space.com. 2020-02-17 [2020-02-18]. （原始内容存档于2021-01-27）.  Gray, Tyler. CRS-20 – Final Dragon 1 arrives at the ISS. NASASpaceFlight.com. 2020-03-09 [2020-05-14]. （原始内容存档于2020-05-25）.  SpX-20 Mission Overview (PDF). NASA. 2020-03-06 [2020-05-31]. （原始内容 (PDF)存档于2020-10-25）.  本文含有此來源中屬於公有领域的内容。 SpaceX launches 60 Starlink satellites into orbit, misses rocket landing. space.com. 2020-03-18 [2020-03-20]. （原始内容存档于2021-03-30）.  SpaceX's Starlink network surpasses 400-satellite mark after successful launch. 2020-04-22 [2020-04-22]. （原始内容存档于2020-04-30）.  Making history, astronauts ride commercial capsule to space station. 2020-05-31 [2020-05-31]. （原始内容存档于2022-05-31）.  Bergin, Chris. SpaceX present to future: From retesting boosters to planning a Starship pad. NASASpaceFlight.com. 2019-08-02 [2019-08-02]. （原始内容存档于2021-04-05）.  引用错误：没有为名为nsf20150305的参考文献提供内容 Heiney, Anna. Top 10 Things to Know for NASA's SpaceX Demo-2 Return. nasa.gov. 2020-07-23 [2020-07-23]. （原始内容存档于2020-08-03）. At the time of undock, Dragon Endeavour and its trunk weigh approximately 27,600 pounds  本文含有此來源中屬於公有领域的内容。 Fletcher, Colin; Gray, Tyler. SpaceX Launches Eighth Starlink Mission, Read The Instructions With East Coast Droneship Debut. NASASpaceFlight.com. 2020-06-04 [2020-06-05]. （原始内容存档于2020-12-09）.  SpaceX to launch first Starlink rideshare mission with Planet Labs. NASASpaceFlight.com. 2020-06-12 [2020-06-13]. （原始内容存档于2021-04-22）.  Gray, Tyler. SpaceX launches first Starlink rideshare mission with Planet Labs. NASASpaceFlight.com. 2020-06-14 [2020-06-14]. （原始内容存档于2021-04-22）.  @SpaceX. Targeting Saturday, 13 June 13 at 05:21 EDT for launch of 58 Starlink satellites and 3 @planetlabs spacecraft – the first SpaceX SmallSat Rideshare Program launch (推文). 2020-06-14 –通过Twitter.  SpaceX [@SpaceX]. New T-0 of 4:10 p.m. EDT due to upper-level winds; vehicle and payload look good for launch (推文). 2020-06-30 –通过Twitter.  Clark, Stephen. SpaceX launches its first mission for the U.S. Space Force. Spaceflight Now. 2020-06-30 [2020-06-30]. （原始内容存档于2021-04-08）.  Live coverage: South Korean military satellite to launch today from Florida. Spaceflight Now. 2020-07-20 [2020-07-20]. （原始内容存档于2020-11-10）.  Falcon-9 v1.2 (Block 5) (Falcon-9FT (Block 5)). Gunter's Space Page. [2020-06-24]. （原始内容存档于2020-11-17）.  SpaceX successfully conducts Starlink v1.0 L9 launch. NASASpaceFlight.com. 2020-08-06 [2020-08-07]. （原始内容存档于2021-04-21）.  SpaceX launches 58 Starlink satellites and 3 SkySats, sticks rocket landing. 太空. 2020-08-18 [2022-01-29]. （原始内容存档于2022-05-31）.  SpaceX Conducts First Polar Launch from Cape in over 50 Years. NASASpaceFlight.com. 2020-08-30 [2022-01-29]. （原始内容存档于2022-05-31）.  SAOCOM 1A, 1B. Gunters Space Page. [2020-07-08]. （原始内容存档于2021-04-09）.  SAOCOM 1B Mission. YouTube. [2020-08-29]. （原始内容存档于2021-03-17）.  SAOCOM (SAR Observation and Communications Satellite) Constellation. eoPortal. [2020-09-23]. （原始内容存档于2021-03-11）.  Clark, Stephen. SpaceX launches more Starlink satellites, beta testing well underway. Spaceflight Now. 2020-09-03 [2020-09-03]. （原始内容存档于2020-11-17）.  SpaceX postpones first Super Sunday flight due to weather. NASASpaceFlight.com. 2020-08-29 [2020-09-12]. （原始内容存档于2020-08-31）.  SpaceX Launched 60 More Starlink Satellites This Week. 2020-10-06 [2022-01-29]. （原始内容存档于2022-05-31）.  Falcon 9 Block 5 | Starlink V1 L12. nextspaceflight.com. [2020-09-05]. （原始内容存档于2020-07-08）.  SpaceX Falcon 9 launches latest Starlink mission. NASASpaceFlight.com. 2020-10-18 [2020-10-22]. （原始内容存档于2021-04-19）.  Falcon 9 Block 5 | Starlink V1 L13. nextspaceflight.com. [2020-09-05]. （原始内容存档于2020-10-20）.  SpaceX launches second Starlink mission of the week. NASASpaceFlight.com. 2020-10-24 [2020-11-16]. （原始内容存档于2021-01-30）.  After month-long stand down, SpaceX launches fourth GPS III launch. NASASpaceFlight.com. 2020-11-05 [2022-01-29]. （原始内容存档于2022-06-09）.  引用错误：没有为名为GPS的参考文献提供内容 Contracts (新闻稿). United States Department of Defense. 2018-03-14 [2018-03-14]. （原始内容存档于2018-08-12）. Space Exploration Technologies Corp., Hawthorne, California, has been awarded a US$290,594,130 firm-fixed-price contract for launch services to deliver the GPS III to its intended orbit  本文含有此來源中屬於公有领域的内容。 Bridenstine, Jim [@JimBridenstine]. Update: Due to onshore winds and recovery operations, @NASA and @SpaceX are targeting launch of the Crew-1 mission with astronauts to the @Space_Station at 7:27 p.m. EST Sunday, Nov. 15. The first stage booster is planned to be reused to fly astronauts on Crew-2. #LaunchAmerica (推文). 2020-11-16 [2020-11-16]. （原始内容存档于2020-11-16） –通过Twitter.  Baylor, Michael [@nextspaceflight]. The core number for this booster is B1061. t.co/YcWgnhYspM (推文). 2020-04-24 [2020-04-24]. （原始内容存档于2020-04-24） –通过Twitter.  International satellite launches to extend measurements of sea level rise. 2020-11-21 [2022-01-29]. （原始内容存档于2022-05-31）.  Live coverage: SpaceX scrubs Starlink launch attempt. Spaceflight Now. 2020-11-25 [2020-11-25]. （原始内容存档于2021-01-18）.  Falcon 9 Block 5 | Starlink V1 L15. nextspaceflight.com. [2020-11-17]. （原始内容存档于2021-01-11）.  Live coverage: Falcon 9 rocket counting down to Cargo Dragon launch. Spaceflight Now. 2020-12-06 [2020-12-20]. （原始内容存档于2021-01-16）.  Falcon 9 Block 5 | CRS-21. nextspaceflight.com. [2020-10-13]. （原始内容存档于2020-12-05）.  SpaceX just launched a powerful Sirius XM satellite into orbit and nailed a rocket landing. Space.com. 2020-12-13 [2022-01-29]. （原始内容存档于2022-01-29）.  Falcon 9 Block 5 | SXM-7. nextspaceflight.com. [2020-10-05]. （原始内容存档于2020-12-10）.  Live coverage: SpaceX launch for NRO delayed to Saturday. Spaceflight Now. 2020-12-19 [2020-12-19]. （原始内容存档于2021-01-16）.  SpaceX launches Turksat 5A. Spacenews.com. 2021-01-08 [2022-01-28]. （原始内容存档于2023-12-13）.  Krebs, Gunter. Türksat 5A. Gunter's Space Page. [2017-11-09]. （原始内容存档于2021-04-06）.  SpaceX launches first Starlink mission of 2021. NASASpaceFlight.com. 2021-01-20 [2021-01-25]. （原始内容存档于2021-04-22）.  Falcon 9 Block 5 | Starlink V1 L16. nextspaceflight.com. [2021-01-15]. （原始内容存档于2021-01-28）.  SpaceX launches a record 143 satellites on one rocket, aces landing. Space.com. 2021-01-24 [2021-01-24]. （原始内容存档于2022-06-14）.  Falcon 9 Block 5 | Transporter 1. nextspaceflight.com. [2021-01-17]. （原始内容存档于2021-01-21）.  Falcon 9 Block 5 | Starlink V1 L18. nextspaceflight.com. [2021-01-26]. （原始内容存档于2021-02-05）.  Falcon 9 Block 5 | Starlink V1 L18. [2021-04-23]. （原始内容存档于2021-02-05）.  SpaceX successfully deploys 60 Starlink satellites, but loses booster on descent. 2021-02-16 [2021-04-23]. （原始内容存档于2021-04-18）.  Baylor, Michael. Starlink V1 L19. nextspaceflight. [2021-02-12]. （原始内容存档于2021-02-15）.  Fletcher, Colin. SpaceX successfully launches long-delayed Starlink L-17 mission. NASASpaceFlight.com. 2021-03-04 [2021-03-04]. （原始内容存档于2021-04-22）.  Falcon 9 Block 5 | Starlink V1 L17. nextspaceflight.com. [2021-02-22]. （原始内容存档于2021-02-07）.  Clark, Stephen. SpaceX adds more satellites to Starlink internet fleet. Spaceflight Now. 2021-03-11 [2021-03-11]. （原始内容存档于2021-03-11）.  Falcon 9 Block 5 | Starlink V1 L20. Next Spaceflight. 2021-03-11 [2021-03-11]. （原始内容存档于2021-04-18）.  SpaceX's Falcon 9 booster flies for 9th time as Starlink constellation grows. NASASpaceFlight.com. 2021-03-14 [2022-01-28]. （原始内容存档于2022-05-31）.  SpaceX launches 60 new Starlink internet satellites, nails latest rocket landing at sea. Space.com. 2021-03-24 [2021-04-23]. （原始内容存档于2021-04-22）.  Starlink V1 L22. Next Spaceflight. [2021-03-13]. （原始内容存档于2021-04-18）.  SpaceX Crew-2 reaches orbit, with Elon Musk's company launching 10 astronauts in under a year. 全国广播公司商业频道. 2021-04-23 [2022-01-28]. （原始内容存档于2021-06-13）.  Foust, Jeff [@jeff_foust]. McErlean: NASA's plans call for reusing the Falcon 9 booster from the Crew-1 mission on the Crew-2 mission, and to reuse the Demo-2 capsule for Crew-2 as well. (推文). 2020-07-23 [2020-07-23] –通过Twitter.  Crew-2 (USCV-2) | Falcon 9 Block 5. Everyday Astronaut. 2021-04-22 [2021-04-23]. （原始内容存档于2022-04-21）.  SpaceX rocket launches another 60 Starlink satellites, nails its 7th landing at sea. Space.com. 2021-04-29 [2021-06-06]. （原始内容存档于2021-12-03）.  Starlink V1 L24. [2021-04-17]. （原始内容存档于2021-12-29）.  paceX's Star Wars Day launch puts 60 Starlink satellites in orbit, lands rocket. Space.com. 2021-05-04 [2021-06-06]. （原始内容存档于2021-12-03）.  Falcon 9 Block 5 | Starlink V1 L25. nextspaceflight.com. [2021-04-29]. （原始内容存档于2022-01-07）.  SpaceX launches 60 Starlink satellites in record 10th liftoff (and landing) of reused rocket. 太空. 2021-05-09 [2021-06-06]. （原始内容存档于2021-05-11）.  Starlink V1 L27. NextSpaceflight.com. [2021-05-05]. （原始内容存档于2021-12-30）.  Replay! SpaceX launches 52 Starlink satellites and 2 rideshare payloads. 太空. 2021-05-15 [2021-06-06]. （原始内容存档于2020-10-22）.  Starlink V1 L26. [2021-05-06]. （原始内容存档于2021-05-15）.  Starlink V1 L26. [2021-05-04]. （原始内容存档于2021-05-15）.  Starlink V1 L26 & Rideshares. [2021-05-15]. （原始内容存档于2021-05-15）.  Starlink v1.0 L28 mission completes first "shell" of satellites for worldwide coverage. NASASpaceFlight.com. 2021-05-26 [2021-06-06]. （原始内容存档于2022-01-02）.  Starlink V1 L28. [2021-05-14]. （原始内容存档于2021-12-30）.  SpaceX launches CRS-22, new solar arrays to International Space Station. NASASpaceFlight.com. 2021-06-03 [2021-06-06]. （原始内容存档于2021-12-29）.  CRS-22. [2021-04-17]. （原始内容存档于2021-11-22）.  SpaceX launches 2nd mission in three days with SiriusXM-8. NASASpaceFlight.com. 2021-06-06 [2022-01-28]. （原始内容存档于2022-05-31）.  引用错误：没有为名为spacex_manifest的参考文献提供内容 SpaceX launches newest GPS satellite on reused booster. NASASpaceFlight.com. 2021-06-17 [2021-09-16]. （原始内容存档于2021-12-03）.  SpaceX's GPS contract modified to allow reuse of Falcon 9 boosters. 2020-09-25 [2021-09-16]. （原始内容存档于2023-12-13）.  引用错误：没有为名为sfn-20181217的参考文献提供内容 Clark, Stephen. For those who track these things, the Space Force tells me the wet mass of the GPS 3 SV05 spacecraft is 9,550 pounds, or 4,331 kg.. Twitter. [2021-06-17]. （原始内容存档于2021-12-03）.  Lentz, Danny. SpaceX successfully launches Transporter 2 mission with 88 satellites. NASASpaceFlight.com. 2021-06-30 [2021-06-30]. （原始内容存档于2021-06-29）.  SpaceX Cargo Dragon CRS-23 launches to ISS. NASASpaceFlight.com. 2021-08-29 [2021-09-16]. （原始内容存档于2021-12-29）.  SpaceX begins second Starlink shell with Vandenberg launch. NASASpaceFlight.com. 2021-09-14 [2021-09-16]. （原始内容存档于2022-01-05）.  Baylor, Michael. Starlink Group 2-1. Next Spaceflight. [2021-09-09]. （原始内容存档于2021-09-07）.  伊隆·马斯克 [@elonmusk]. These are V1.5 Starlinks with laser inter-satellite links, which are needed for high latitudes & mid ocean coverage (推文). 2021-09-11 –通过Twitter.  Starlink mission. [2021-09-11]. （原始内容存档于2020-05-24）.  Clark, Stephen. Live coverage: SpaceX ready to launch first all-private crew into orbit tonight. Spaceflight Now. 2021-09-16 [2021-09-16]. （原始内容存档于2021-12-30）.  @124970MeV. inspiration 4 will use B1062-3 (推文). 2021-08-01 –通过Twitter.  Jared Isaacman is taking St. Jude on an 'epic adventure' to space, but it will be grounded in the good it can do on Earth. 2021-02-01 [2021-09-16]. （原始内容存档于2021-12-03）.  Clark, Stephen. Four private citizens ride SpaceX rocket into orbit on historic mission. Spaceflight Now. [2021-02-01]. （原始内容存档于2022-04-16）.  SpaceX debuts new Dragon capsule in launch to the International Space Station. spaceflightnow.com. 2021-11-11 [2021-12-18]. （原始内容存档于2021-11-22）.  CRS-22 Mission Overview (PDF). [2021-05-27]. （原始内容存档 (PDF)于2021-10-30）.  Crew-3 (USCV-3) | Falcon 9 Block 5. Everyday Astronaut. 2021-10-24 [2021-11-11]. （原始内容存档于2021-11-11） （美国英语）.  SpaceX conducts Saturday Starlink launch from Cape Canaveral. NASASpaceFlight.com. 2021-11-13 [2021-12-18]. （原始内容存档于2021-12-02）.  Neal, Mihir. SpaceX poised for Starlink launch from Cape Canaveral. NASASpaceFlight.com. 2021-11-12 [2021-11-12]. （原始内容存档于2021-12-02） （美国英语）.  @TSKelso. CelesTrak has pre-launch SupTLEs for the #Starlink Group 4-1 launch set for Nov 12 at 1240 UTC of 53 satellites from Cape Canaveral. Deployment is set for 12:55:56.740 UTC, just over 15 minutes after launch. (推文). 2021-11-10 –通过Twitter.  NASA's DART asteroid redirect mission launches aboard Falcon 9 from Vandenberg. NASASpaceFlight.com. 2021-11-23 [2021-11-24]. （原始内容存档于2022-01-02）.  @StephenClark1. B1063 with another assignment. This one is a drone ship landing. (推文). 2021-10-20 [2021-10-21] –通过Twitter.  Double Asteroid Redirection Test (DART). [2019-09-11]. （原始内容存档于2021-11-22）.  本文含有此來源中屬於公有领域的内容。 Live coverage: SpaceX launches Starlink and BlackSky satellites. 2021-12-02 [2021-12-02]. （原始内容存档于2021-12-05）.  Launch Thread: SpaceX to launch another batch of Starlink V1.5 satellites [U: Dec. 1 weather report]. Space Explored. 2021-12-01 [2021-12-02]. （原始内容存档于2021-12-02） （美国英语）.  SXRS-2: We're taking Blacksky to space (again!). 2021-11-30 [2021-12-18]. （原始内容存档于2021-12-28）.  NASA, SpaceX launch IXPE x-ray observatory atop Falcon 9. NASASpaceFlight.com. 2021-12-08 [2021-12-18]. （原始内容存档于2022-01-13）.  Brown, Katherine. NASA Awards Launch Services Contract for Astrophysics Mission. NASA. 2019-07-08 [2019-07-08]. （原始内容存档于2022-01-04）.  本文含有此來源中屬於公有领域的内容。 SpaceX Falcon 9 completes rare 53 degree inclination launch from Vandenberg. NASASpaceFlight.com. 2021-12-17 [2021-12-18]. （原始内容存档于2021-12-23）.  存档副本. [2021-12-18]. （原始内容存档于2021-12-24）.  Turksat-5B rides second of three Falcon 9 launches in three days. NASASpaceFlight.com. 2021-12-18 [2022-01-06]. （原始内容存档于2021-12-19）.  Sahin, Tuba. Turkey to launch Turksat 5B communications satellite in Q4. 安那托利亞通訊社（英语：Anadolu Agency）. 2021-04-07 [2021-09-17]. （原始内容存档于2021-12-03）.  SpaceX lands 100th Falcon booster. [2022-01-06]. （原始内容存档于2021-12-26）.  引用错误：没有为名为sfn6122的参考文献提供内容 Sesnic, Trevor. SpaceX conducts first orbital launch of 2022 with Starlink Group 4-5. NASASpaceFlight.com. 2022-01-06 [2022-01-06]. （原始内容存档于2022-01-11）.  @TSKelso. CelesTrak has pre-launch SupTLEs for the #Starlink Group 4-5 launch of 49 Starlink satellites from Cape Canaveral on 2022-01-06 at 21:49:10 UTC. Deployment is set for 15.6 minutes after launch at 2022-01-06 at 22:04:46.380 UTC: celestrak.com/NORAD/elements/supplemental/starlink.txt (推文). 2022-01-05 –通过Twitter.  SpaceX launches Transporter-3 rideshare mission and lands booster at LZ-1. NASASpaceFlight.com. 2022-01-13 [2022-01-28]. （原始内容存档于2022-05-31）.  Transporter-3 Mission. [2022-01-12]. （原始内容存档于2020-05-24）.  SpaceX F9 : Transporter-3 Rideshare : CCSFS SLC-40 : 2022年1月13日 (1525 UTC). [2022年1月28日]. （原始内容存档于2022年6月1日）.  Clark, Stephen. SpaceX launches 2,000th Starlink satellite. Spaceflight Now. 2022-01-19 [2022-01-19]. （原始内容存档于2022-01-21）.  引用错误：没有为名为sfn_ls的参考文献提供内容 一阵“风”吹过，40颗美国卫星就报废……. [2022-02-10]. （原始内容存档于2022-02-10）.  NASA, Space Station Partners Approve First Axiom Mission Astronauts. 美国国家航空航天局. 2022-04-08 [2022-04-08]. （原始内容存档于2022-04-02）.  引用错误：没有为名为nextSFupcoming的参考文献提供内容 Haas Ellis, Kathleen. NASA and SpaceX Adjust the Agency's Crew-4 Launch Date. 美国国家航空航天局. 2022-04-27 [2022-04-27]. （原始内容存档于2022-06-01）.  Clark, Stephen [@StephenClark1]. NASA’s Steve Stich: Crew-4 mission in April will be the first NASA astronaut launch with a fourth-flight Falcon 9 booster. B1067 flew on CRS-22, Crew-3, and Turksat 5B. Future crew missions could use a fifth flight booster. Crew-4 will use a brand new Crew Dragon spacecraft. (推文). 2022-01-19 [2022-01-19] –通过Twitter.  引用错误：没有为名为scientificamerican-2的参考文献提供内容 Lindgren, Kjell [@astro_kjell]. FREEDOM!! Crew-4 will fly to the International Space Station in a new Dragon capsule named “Freedom.” The name celebrates a fundamental human right, and the industry and innovation that emanate from the unencumbered human spirit. [...] (推文). 2022-03-23 [2022-03-23] –通过Twitter.  SpaceX [@SpaceX]. Targeting Saturday, June 18 at 7:19 a.m. PT for a Falcon 9 launch of the SARah-1 mission from Space Launch Complex 4E in California (推文). 2022-06-16 –通过Twitter.  引用错误：没有为名为cooper的参考文献提供内容 Falcon Heavy | USSF-44. Next Spaceflight. [2022-10-13]. （原始内容存档于2020-11-12） （英语）.  U.S. Department of Defense Contracts for February 19, 2019. 2019-02-19 [2019-02-20]. （原始内容存档于2019-05-19）.  本文含有此來源中屬於公有领域的内容。 LINUS-A Orbital Debris Assessment Report (ODAR). FCC: 7. 2021-01-11 [2022-11-01]. （原始内容存档于2022-11-01）.  Erwin, Sandra. Lockheed Martin takes aim at satellite servicing market. SpaceNews. 2021-08-10 [2021-08-11].  引用错误：在<references>标签中name属性为“Upcoming-ELaNa”的参考文献没有在文中使用