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重点讲解：
1. fall ill 突然生病；
She may fall ill, in which case she will have to be taken to the hospital at once.
她可能病了。如果是这样，就得马上送她上医院。
2. rule out 排除；不予考虑；
But this does not rule out unofficial discussions.
但这并不排除进行非正式的讨论。
3. carry out 实施；执行；实行；
The programme is hard to carry out.
这个方案不好操作。
4. on the verge of 即将；接近于；濒于；
The company is on the verge of insolvency.
该公司快要破产了。
v. 加强，变坚固
