相关简介
本课件系统讲解了《Space Exploration》SectionC的核心词汇与重点句式，重点分析了lack、otherwise等高频词的用法，以及It takes...句式的结构特点，帮助学习者掌握太空探索相关英语表达。
互动探究
重点词汇
1. lack n. 缺乏；短缺 vt. 没有；缺乏
Astronauts’ bones and muscles can get very weak in space due to the lack of gravity, so they need to exercise every day, which will help them stay healthy.（教材P42）在太空中，宇航员的骨骼和肌肉会由于缺乏重力而变得非常脆弱，所以他们每天都需要锻炼，这会帮助他们保持身体健康。
I’m not worried about her lack of experience—we can easily train her. 我一点也不担心她缺少经验，我们可以很容易地培训她。
The reason why he failed in the driving test was that he lacked confidence in himself. 他驾照考试失败的原因是对他自己缺乏信心。
2. otherwise adv. 否则；要不然
Astronauts have to use tape to stick everything down while working in space because everything would float off otherwise.（教材P42）宇航员在太空工作时必须用胶带把所有的东西都粘住，不然的话一切都会飘走。
I’m lucky that I’m interested in school work, otherwise I’d go crazy. 幸好我对学校作业感兴趣，不然会疯的。
I will try my best to do it. I would not make a promise otherwise. 我会尽全力去做的，否则我就不会作出承诺。
It was necessary to discover the truth or otherwise of these statements. 有必要查证这些说法的真实性或虚假性。
The bike needs a new saddle, but otherwise it’s in good condition. 这辆自行车需要一个新车座，除此以外它完好无损。
Don’t start giving me problems, otherwise I’ll have to be very unpleasant indeed. 不要开始给我找麻烦，否则我就不客气了。
Bob helped me. Otherwise, I wouldn’t have finished the task on time. 鲍勃帮助了我。否则我不可能按时完成任务的。
重点句式
...it would take over two years to get to the closest planet, Mars, and back.（教材P42）……到达最近的行星——火星，并返回，需要超过两年的时间。
【句式剖析】 It takes/took sb some time to do sth 意为“做某事花费某人……时间”。
It takes a long time to get from London to Sydney. 从伦敦到悉尼要花很长时间。
