It also slows down more as you move faster, which means astronauts (宇航員) someday may survive so long in space that they would return to an Earth of the distant future.
出自-2011年6月聽力原文
柯林斯高階英漢雙解學習詞典釋義
N-COUNT
航天員;太空人;宇航員
An astronaut is a person who is trained for travelling in a spacecraft.
英漢詞典釋義
n.
宇航員, 太空人
There're three astronauts in the spacecraft.在這艘宇宙飛船里有三名宇航員。