请问drop off 的中文意思是什么啊
问题描述：
请问drop off 的中文意思是什么啊
答
1．fall off掉下My top button has dropped off and I cann't find it．我最上面的钮扣掉了,找不到了.2．become fewer or less；decline 减少；下降The number of students has been dropping off recently．近来学...