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