fall off

名词 fall off:

1. a noticeable deterioration in performance or quality
   同义词：slump, slack, drop-off, falloff, falling off

动词 fall off:

1. come off
2. fall heavily or suddenly; decline markedly
   同义词：slump, sink
3. diminish in size or intensity
   同义词：fall away

1. 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。
2. Be careful not to fall off the ladder.
   当心别从梯子上掉下来。
3. One slip and you could fall off the cliff.
   脚下一滑就可能从悬崖上跌下去。