- 往下跑：
Don't run down the stairs. Just walk down slowly.
下楼梯时别跑，慢慢走下去。
- 往下流：
All rivers run down to the sea.
条条河水向下流入大海。
- 停止运转；停产；耗尽：
The battery in my car ran down this evening.
我的汽车里的蓄电池今天晚上用完了。
My watch has run down.
我的表停了。
- (健康)衰退；虚弱：
His father is terribly run down and is unfit for work right now.
他的父亲非常虚弱，不适于立刻就上班。
- 缩减；降低：
The labour force in our mine is running down rapidly.
我们矿上的劳动力正在迅速减少。
- 衰落；使精疲力竭：
The coal industry is running down as coal is gradually replaced by oil.
由于煤炭逐渐被石油所代替，因此煤炭工业正在衰落。
- (车)把…撞倒；(船)把…撞沉：
The ship ran down a small fishing boat.
这艘轮船撞沉了一条小渔船。
He rode his bicycle too fast and almost ran down a child.
他骑自行车骑得太快了，差一点撞倒一个小孩。
- 查出；搜到：
I have run down the word in my dictionary eventually.
我终于在我的字典里查到了这个词。
- 把…追得精疲力竭；追获；捕杀：
The police ran down the thief in a restaurant.
警方在一个饭馆里抓到了这个小偷。
- 诽谤；贬低：
She is always running down her mother-in-law in public.
她一贯公开地说她婆婆的坏话。
- 快读；浏览；扫视：
He ran his eyes down the page and found his name at last.
他的眼睛顺着这一页往下看，终于找到了他的名字。