老师:你们不必把整本书全读完,但必须读完前四章。
You must cut down that dead tree or it will fall on your house.
你必须把那棵死树砍了,否则它会倒在你的屋顶上。
Doctor:You mustnt take more than two of these pills at once.Three might be fatal.
医生:这些药你每次服用时不得超过两片。服三片就可能有生命危险。
Doctor(to patients wife):If the pain has gone he neednt take any more of these.
医生(对患者的妻子):如果疼痛已经消失了,他就不必再服这些药片了。
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2016-02-29
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