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1·He fall down on the job.

他未能做好这件工作。

2·If you fall down on the job of studying once more, you won't pass this course.

如果你再不认真学习，这门课程就要不及格啦。

3·And the purpose of the public option is to make sure that the industry doesn't waste another 15 years - by giving Americans an alternative if private insurers fall down on the job.

而公共选择权的目的就是为了确保保险业不会再浪费另一个15年——如果私营保险失败了，它还可以给美国人民提供其他的选择。