（病痛等）复发; 炫耀; 行动倔强; （机器等）功能失常
ph.
1. The dogs acted up when a stranger entered the front yard.
有陌生人走进前院时，狗就开始又叫又跳。
2. The car's engine began to act up.
汽车的发动机开始出毛病了。
3. My car has been acting up again.
我的车子功能又出问题了。
4. The boy is fond of acting up with him.
这男孩喜欢和他一同捣蛋。
act up的反义词
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
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. \u0039\u0031\u0031\u67E5\u8BE2\u00B7\u82F1\u8BED\u5355\u8BCD
1. I can only pray that some of these parents will wake up and begin to act responsibly for a change.
2. GOP Senate leaders said they did not act lightly in asking Craig to give up his leadership posts temporarily.
3. Men and women will clean up their sartorial act for the new year.
4. act up
4. The bankruptcy of an American corporate icon such as GM looks like a compelling case of the US starting to clean up its economic act.
5. The government has pledged to eventually free up prices, but has been reluctant to act because of inflation concerns.
6. Lawmakers should act to make sure that statisticians never ever come up with statistics that are totally out of touch with reality.
7. act up
7. Lawmaker Cyd Ho of Civic Act Up said postponement would not solve the problem that now confronted the assembly.
8. act up在线翻译
8. And they say they must act to make up for what they have erred by going green.
9. act up
9. Someone in America needs to act and step up and take responsibility like Shan Jixiang has in China.
10. act up的翻译
10. Certain Japanese media outlets even resorted to the despicable act of making up stories to create the impression that other countries supported Japan's position.
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