act up
US /ækt ʌp/
UK /ækt ʌp/
1.
调皮捣蛋, 行为不端
behave badly or improperly
:
•
The children started to act up during the long car ride.
孩子们在漫长的车程中开始调皮捣蛋。
•
If you act up again, you'll be sent to your room.
如果你再调皮，你就会被送回房间。
2.
出故障, 不舒服
(of a machine or part of the body) fail to function properly
:
•
My old car always starts to act up in cold weather.
我的旧车在寒冷天气里总是开始出故障。
•
My knee has been acting up ever since I went for that long run.
自从我跑了那次长跑后，我的膝盖就一直不舒服。