on the fly

英文解釋：

副詞 on the fly:

1. on the run or in a hurry

字典網

相關對話：

1. The bird caught a bug on the fly.
   那鳥在飛行中捉住了一隻昆蟲。
2. John is very busy, and people who want to talk to him have to catch him on the fly.
   約翰非常忙，人們要找他談話只能在他百忙中瞅個空子。
3. Housework keeps mother on the fly all day.
   家務勞動使母親整天忙忙碌碌。