a drop-off in [noun]
表示在某方面下降。
There has been a drop-off in sales this quarter.
本季度销售额有所下降。
下降；减少
drop-offs — plural of drop-off
恶化；衰退；陡壁；悬崖；突然的下坡或悬崖；减少,尤其是突然的减少；投递；留下包裹等的行为
a noticeable decrease or decline
突然的下坡或悬崖
A sudden downward slope or cliff.
减少,尤其是突然的减少
A decrease; especially, a sudden one.
投递；留下包裹等的行为
A delivery; the act of leaving a package, etc.
乘客(如学生)被放下的时间或行为
A time during which passengers, such as school children, are dropped off; the event or act of dropping them off.
There has been a sharp drop-off in sales this quarter.
本季度销售额急剧下降。
用法提示：drop-off 为名词，表示数量上的下降、减少。
The team noticed a drop-off in performance after the break.
团队注意到休息后表现有所下降。
用法提示：drop-off 作名词，指质量或水平的下降。
Experts predict a drop-off in energy use over the next decade.
专家预测未来十年能源使用量会减少。
用法提示：drop-off 是名词，表示数值或程度的减少。
表示在某方面下降。
There has been a drop-off in sales this quarter.
本季度销售额有所下降。
表示下降的具体数量或比例。
The company reported a drop-off of 15% in profits.
公司报告利润下降了15%。
用于形容悬崖或陡坡。
The trail ends at a steep drop-off into the valley.
小路的尽头是通往山谷的陡峭悬崖。
grammar · medium
易错句子There was a sudden drop off in attendance.
正确表达There was a sudden drop-off in attendance.
中文学习者常将名词 'drop-off' 误写成动词短语 'drop off'。作为名词时应使用连字符，表示‘下降’或‘减少’。
grammar · medium
易错句子The company experienced several drop-off in revenue.
正确表达The company experienced several drop-offs in revenue.
'drop-off' 是可数名词，复数形式应为 'drop-offs'，表示多次下降。
drop-off是名词，意为下降或陡坡；drop off是动词短语，意为打瞌睡或放下东西。
drop-off是名词，指数量下降或陡坡；dropout是名词，指退学的人。
drop-off和fall-off都表示下降，但drop-off更常指突然或明显的减少，而fall-off可指任何类型的减少。
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