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重点讲解：
1. be admitted to 接受（入院）；收治；
She was admitted to hospital with a soaring temperature.
她因发高烧被送进医院。
2. at the center of (关注的)中心，焦点；中心人物；
The prime minister is at the centre of a political row over leaked Cabinet documents.
首相成了内阁文件泄密而引起的一场政治风波的中心人物。
3. be known as 称为；叫做；
The drug is commonly known as Ecstasy.
这种药通常称作摇头丸。
4. be faced with 面临；面对；摆在…面前；
We are faced with a serious problem.
我们面临着一个严重问题。
