fall off

US /fɔːl ɔːf/
UK /fɔːl ɔːf/
"fall off" picture
1.

下降, 減少

to decrease in quantity or quality; to decline

:
Sales tend to fall off during the winter months.
冬季銷量往往會下降
His performance has started to fall off recently.
他最近的表現開始下滑
2.

掉落, 脫落

to become detached or separated from something

:
The button fell off his shirt.
鈕扣從他的襯衫上掉了下來
Be careful not to fall off the ladder.
小心不要從梯子上掉下來