fall这是什么意思

　　例句：

　　She broke her right leg in a bad fall.

　　她在一次严重的`跌倒中右腿骨折了。

　　They announced a fall in pretax profits.

　　他们宣布了税前利润的下降。

　　Large flakes of snow began swiftly to fall.

　　大片大片的雪花开始飞快地落下。

　　House prices could perk up during the fall.

　　秋季房价可能会上涨。