| 词组 | on the fly |
| 释义 | on the fly2adj. phr.informal Busy; going somewhere in a hurry; going about doing things. 〖非正式〗忙碌的；匆匆赶往某处；四处奔忙。◆ Getting the house ready for the visitors kept Mother on the fly all day.为了准备客人来访，母亲清理房间忙碌了一整天。 |
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