Language Points 1.allow的用法 v.允许，准许，其用法为: (1）allow doing sth.“允许做某事”。相当于beallowed to do sth.。 e.g.:We don't allow smoking.=We aren't allowed tosmoke. (2）allow sb. to do sth.允许某人做某事。(3) be allowed to do sth.被允许做某事。

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