| 词组 | act up |
| 释义 | act up 1. to behave badly. Sometimes kids act up because they just want attention. Usage notes: usually used to refer to children 2. to operate badly. My computer began acting up and I lost a whole day's work. 3. to become active. Her allergies acted up when she went hiking in the woods. Usage notes: usually used to refer to a medical condition |
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