Question: តើអ្វីទៅជាតំបន់ចំនួនបួននៅក្នុងសហរដ្ឋអាមេរិក
Answer: តំបន់ពេលវេលាអាត្លង់ទិក; เขตเวลาตะวันออก; តំបន់ពេលវេលាភ្នំ; Múi giờ Thái Bình Dương; เขตเวลาตอนกลาง