Drop-off is a noun referring to a steep downward slope, or a sharp decline.
drop-off: n. 指急下降或直下降。
| 单词 | drop-off |
|---|---|
| 音标 | [ˈdrɔpɔf] [ˈdrɑpˌɔf, -ˌɑf] |
| 释义 | n.["急下降，直下降"] |
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