swap-on-the-fly

常见例句

• The bird caught a bug on the fly.
  那鸟在飞行中捉住了一只昆虫。
• Housework keeps mother on the fly all day.
  家务劳动使母亲整天忙忙碌碌。
• The housekeeper of our school is always on the fly.
  学校管理员整天忙得很。
• Do you run through each day on the fly ?
  你的日子是不是像飞一样的跑过你的眼前?
• The laws were being changed on the fly.
  法律在执行过程中被改变了。
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