Mad as a hatter指一个人出现精神错乱。从1835年起,这个短语就用来形容一种帽子制作者身上患有的病症。 In 18th and 19th century England mercury was used in the production of felt, which was used in the manufacturing of hats common of the time. 在18世纪和...
first可用作形容词或副词,有时还可用作代词;而at first作为介词短语,只起副词用作用(在句中用作状语)。如: First class is the most expensive way to travel. 坐头等舱是最贵的旅行方式。(first为形容词,在句中用作定语) This is the first time I have heard of suc...
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