drop-off /ˈdrɑːpˌɑːf/ noun plural drop-offs
plural drop-offs
Learner's definition of DROP-OFF
[count]
1
: a very steep downward slope陡下坡 2
: a very large decrease in level or amount暴跌;大幅减少 — see also drop off at 2drop 3
: the act of taking someone or something to a place and then leaving : the act of dropping someone or something off送抵;递送