CNN news 2010-02-27 加文本

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例如：You have fallen through a crack in the system.

fall through a crack: 这里很形象的说掉进了一个裂缝里，喻指现在的状况刚好处于现在这个系统的一个漏洞里。

2.But because Eric Cropp was the supervising pharmacists and should have caught the mistake, he was sent to jail.

should have，原本应该做到而没有做到，与事实相反。

3.After Emily's death, Kelly Jerry pushed for laws in Ohio requiring new training and certification for pharmacy workers.

push for急切、强烈地要求, 为…奋力争取

例句：People living near the airport are pushing for new rules about night flight.
      住在机场附近的人们正强烈要求制订出夜航班机的新规。