fall off
US /fɔːl ɔːf/
UK /fɔːl ɔːf/

1.
下降, 减少
to decrease in quantity or quality; to decline
:
•
Sales tend to fall off during the winter months.
冬季销量往往会下降。
•
His performance has started to fall off recently.
他最近的表现开始下滑。
下降, 减少
to decrease in quantity or quality; to decline