act up基本解释
出毛病； 运转不正常； 耍脾气； 捣蛋
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verb
1. make itself felt as a recurring pain
e.g. My arthritis is acting up again
2. misbehave badly
act in a silly or improper way
e.g. The children acted up when they were not bored
Synonym: carry on
1. 运作不正常；出毛病
If something is acting up, it is not working properly.
e.g. She was messing with the coffee pot, which was acting up again.
她正在鼓捣咖啡壶，那壶又坏了。
2. （孩子）耍脾气，捣蛋
If a child is acting up, they are behaving badly.
e.g. I could hear Jonathan acting up downstairs.
我能听见乔纳森在楼下撒泼。
1. 胡闹,出毛病：35. put one's foot in one's mouth - 祸从口出 | 41. act up - 胡闹,出毛病 | The children started to act up as soon as the teacher left the room. 老师一离开教室,孩子们就闹起来了.
2. 调皮：act up to 遵守 | act up 调皮 | act upon 遵照
3. 运作不正常：13.provided the transport comes though.若果交通顺利的话 | act up=运作不正常 | 14.Hit a sore spot,didnt I? 说到你痛处了,是不是?
4. 发作,尤指疾病发作：acquire a taste 对......有兴趣,开始喜欢 | act up 发作,尤指疾病发作 | add up 加,加起来,加到一起
