落下；The knife fell from her nerveless fingers. 刀从她无力的手里落下。

相关介绍：

Evans had rheumatic fever, missed school and fell behind

伊万斯得了风湿热，没去上课，功课也落下了。

It is important not to let production levels fall.

重要的是别让产量滑落。

The results of the survey fell into two distinct groups.

调查结果分为截然不同的两组。

Students over 25 fall into a different category.

25岁以上的.学生属另一类。

There is still a risk that the whole deal will fall through.

整桩买卖化为泡影的风险仍然存在。

I have a little money in the bank to fall back on.

我在银行还有一点钱，需要时可以动用。

Falling interest rates may help to bolster up the economy.

利率下降可能有助于激活经济。