fall這是什麼意思

例句：

She broke her right leg in a bad fall.

她在一次嚴重的`跌倒中右腿骨折了。

They announced a fall in pretax profits.

他們宣佈了税前利潤的下降。

Large flakes of snow began swiftly to fall.

大片大片的雪花開始飛快地落下。

House prices could perk up during the fall.

秋季房價可能會上漲。