fall off

vi. 跌落, 下降, （船只）偏离船头指向的顺风的位置

例句与用法：

It used to be my favourite restaurant but the standard of cooking has fallen off recently.

那是我以前最喜欢的饭馆，但近来烹饪水平已大不如前了。

Be careful not to fall off the ladder.

当心别从梯子上掉下来。

One slip and you could fall off the cliff.

脚下一滑就可能从悬崖上跌下去。

详细释义：

1. (数量)减少

Enrollment has fallen off this year.

今年入学人数减少了。

2. (势力、地位等)降低

3. 脱离