滾下的用法和樣例：
例句
-
她滾下了樓梯。
She tumbled down the stairs. -
當巖石沿著(zhù)山坡滾下時(shí)，沖力便愈來(lái)愈大。
As the rock rolled down the mountainside, it gathered momentum. -
球滾下了山。
The ball rolled down the hill. -
石頭滾下山。
The stone rolled down the hill. -
石頭滾下山時(shí)，它的動(dòng)量增加。
As the rock rolled down the mountainside, it gathered momentum.
