关于fall down/off 和cut down/off的用法

fall down
倒塌; 跌倒
fall off
跌落,滚落下
cut down
把…砍倒〔割掉〕
He cut the tree down.
他砍倒了这棵树.
裁短,改小
My sister cut father's coat down to fit me.
我的姐姐按我的身材把父亲的上衣裁短了.
减少,降低
We were for cutting down the cost of production.
我们赞成降低成本.
cut off
剪〔切,砍〕下
Kehr cut off some flowers from the bush.
凯尔从树丛中剪下一些花.
切〔隔〕断,阻碍
Our troops cut off the enemy's retreat.
我们的军队切断了敌人的退路.
迅速离开
He cut off down a side street.
他从一条侧道跑掉.
(疾病等)使(人)死亡
Disease cut Brooks off in the best part of life.
疾病结束了布鲁克斯盛年的生命.
不留遗产
Jim's uncle cut him off without a penny.
吉姆的叔叔没有留给他一文钱.