Definition (减少)
When the quantity, number, or quality of something decreases.
数量减少；下降
As the season changed, the number of customers dropped off significantly.
随着季节变化，顾客数量显著减少。
The participation in the program dropped off after the first month.
参与该计划的人数在第一个月后就减少了。
Sales began to drop off due to the emergence of new competitors.
由于新竞争对手的出现，销售量开始下降。