Now let's leap ahead, and much farther afield. What kinds of issues might a crew of astronauts face on a longer journey-say, a round-trip to Mars?
现在让我们跳跃前进，更进一步地研究这个话题：宇航员在长期的太空旅行，换句话说，环游火星时可能要面临的问题？
The goal is to gain experience about the psychological challenges that a crew will face on a trip to Mars.
这项实验的目的是在船员将在到火星的旅程中面临的心理挑战上获得经验。
Cook and his crew would observe Venus gliding across the face of the Sun, and by doing so measure the size of the solar system.
库克和他的船员们将观测金星从太阳上滑过，以此来测算太阳系的大小。
Before the meeting started, the whole crew, wearing the down jackets sponsored by "the North Face", took group pictures in front of Potala Palace under the beautiful sunset.
在会议开始之前，所有的队员身穿着由“TheNorthFace”赞助的服装，映着美丽的夕阳在布达拉宫前拍摄了集体照。
Before the meeting started, the whole crew, wearing the down jackets sponsored by "the North Face", took group pictures in front of Potala Palace under the beautiful sunset.
在会议开始之前，所有的队员身穿着由“TheNorthFace”赞助的服装，映着美丽的夕阳在布达拉宫前拍摄了集体照。
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