英 [ækt ʌp] 美 [ækt ʌp]
行为不端，调皮捣蛋：指行为不守规矩，不听话，或者任性地表现出来。
功能失常，出毛病：指设备或机器出现问题，无法正常运行。
恶化，加重：指疾病或症状在原本平稳的状态下突然变得活跃或加剧。
act up //
动词 to behave in a troublesome way 捣蛋
the engine began to act up when we were miles from anywhere
misbehave badly; act in a silly or improper way
同义词： carry on
make itself felt as a recurring pain
... uphold 支持 act up 出毛病 deal 协定 ...
... act under compulsion被迫去做 act up表现不好; 行为不良; (机器)出毛病; 作弄; 开玩笑; (旧病)复发; 恶化 act up to one's ideal遵照某人的理想办事 ...
调皮；运作不正常；出毛病
Watch Ricky.He sometimes likes to act up in class.
注意里基，他有时喜欢在课堂上捣乱。
Watch Ricky. He sometimes likes to act up in class.
注意里基，他有时喜欢在课堂上捣乱。
"Look," he said to Cass, "you act up again and you're out."
“听着，”他跟卡丝说，“你再胡闹就出去。”
They'd all dress up in their robesand their bed sheets and act like a bunchof ghosts or spooks or something.
VOA : standard.other
up employing something called programming, the act of constructing, telling a computer to do your bidding.
你们会使用一种叫做程序设计的方法，或称之为构建，即让计算机去执行你的命令。
计算机科学课程节选 : 哈佛公开课
In the controversies that are leading up to the Licensing Act, one of the authors most frequently mentioned as posing a special threat to the well-being of the English nation is our very own Milton.
这些论战导致了《权利法》的出台，最常提到的对英国的繁荣富强有着特殊威胁的,作者之一就是弥尔顿。
弥尔顿课程节选 : 耶鲁公开课
"We need to see this the actual law passed by Congress, this EPCA, Electronic Privacy Communications Act made much more stronger, brought up to date.
VOA : standard.2010.06.22
Thornton says the new amendment to the Lacey Act is a wake-up call for anyone who wants to trade in the lucrative U.S.wood products market.
VOA : standard.2010.05.28
Young people tend to act quietly near their homes and act up in the entertainment districts.
And American judges and lawyers deny (not always plausibly) that they act up for the camera.
ECONOMIST: Broadcasting bits of court cases might be a good idea
No executive would admit thinking this but too often we see examples of how they act up on it.