off adv.表示状态的关闭或离开prep.离开；在...之外adj.空闲的；离开的；关闭的v.离开；脱下
双语例句
Yura took a handful of branches from a Russian olive tree and whacked the blackened skin of the potatoes until the ash had fallen off, leaving behind only the gold-colored meat. 郁拉拿一把俄罗斯橄榄树枝，拍去土豆黑色外皮和碳灰，留下金黄色的土豆肉。
With a flap of its wings, the bird was gone. 鸟扑打着翅膀飞走了。
