| 单词 | act up |
| 释义 | act up [phrasal verb] 1 : to behave badly : to act in a way that is not polite or acceptable淘气；捣蛋 The kids are acting up [=misbehaving] again.孩子们又在捣蛋。 The book gives advice to parents whose children act up.这本书给那些孩子很调皮的父母提供了建议。 2 of a machine : to not work properly（机器）发生故障 The camera started acting up [=malfunctioning] after I dropped it.相机被我摔了之后就出问题了。 3 of a disease : to become worse and to start causing pain or physical problems（疾病）发作 His asthma acts up when it's cold outside.外面天气冷的话他的哮喘病就会发作。 Whenever it rains, my arthritis starts acting up.只要一下雨，我的关节炎就会发作。 act |
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