break the back of造句

1、It took them all day to break the back of the job.
他们干了一整天才把工作的最主要部分完成了。

2、Defeat in North Carolina seemed to break the back of the entire fundamentalist crusade.
在北卡罗来纳的失败，似乎使整个原教旨主义运动再也无能为力了。

3、We are casting about how to break the back of the work.
我们正在考虑怎样完成这件工作的最艰巨部分。

4、I should break the back of this piece of the work by this weekend.
到这个周末我应该完成这件工作中最艰巨的部分。