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重点讲解：
1. on board 在火车（或轮船、飞机）上；
The six astronauts on board will spend ten days in space.
飞船上的6名宇航员将在太空度过10天。
2. take off 把…带走；(尤指强迫某人)使同去；
The police stopped her and took her off to a police station.
警察拦住她，把她带到了警察局。
3. give away 赠送；
Give away any food you have on hand, or lock it up and give the key to the neighbours.
把手头的所有食物都送给别人，或者把食物藏好锁起，然后将钥匙交给邻居。
3. as soon as 一…就…；
As soon as the opportunity presented itself, she would get another job.
一有机会，她就会另谋新职。
