介绍:
It must be hard to tell the time when you’re in space - a clock won’t work, and you can’t use the Moon, Earth or Sun! Astronauts stay in touch with base, and follow a set Earth - time. It’s their radio, not their clock, that tells them the time!
1.space：太空
2.Astronauts：宇航员
3.stay in touch with：保持联系；与......保持联络
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