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重点讲解：
1. take up 占用，花费(时间、空间或精力)；
I know how busy you must be and naturally I wouldn't want to take up too much of your time.
我知道您肯定特别忙，我当然不想占用您太多的时间。
2. let alone （通常用在否定句后）遑论，更别提，更不用说；
It is incredible that the 12-year-old managed to even reach the pedals, let alone drive the car.
12岁的孩子能踩到踏板已经是不可思议，就更不用说开车了。
3. sign up for (和…)签约；雇用；报名(参加课程)；
If anger management is difficult for you, sign up for a course to help you deal with it.
如果对你来说管理愤怒很困难，那么报名参加一个帮助你解决的课程。
4. break down 分解；将…分成若干部分；
The report breaks down the results region by region.
报告将调查结果按地区分成若干部分。
