语音讲解：
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　　a kind of word which is four-letter-long and is considered vulgar

　　一种四个字母的字，被视为低俗

　　She told us that the man cursed her，and used a lot of four-letter words which she was too embarrassed to repeat.

　　她告诉我们，那人咀咒她，并用了许多她羞于复述的低俗字眼。