That is, anyone is freely licensed to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software.
也就是，任何人被授权可以自由的使用，复制，研究和以任何方式来改动软件，并且其源代码是开放和共享的，因此人们被鼓励志愿的改善软件的设计。