to criticize someone or something, often unfairly

He's always running himself down. 他老是贬低自己。

to hit and injure a person or animal with a vehicle, especially intentionally

Two masked men on motorbikes tried to run me down. 两个戴面罩的人骑着摩托车想要撞我。

to find someone or something after following or searching for him, her, or it for a long time

I finally ran Mr Green down in/to a house in the country. 我终于在乡下的一所房子里找到了格林先生。

to reduce a business or organization in size or importance, or to become reduced in this way

The government is secretly running down the troop levels. 政府正在暗地里缩减军队规模。

If a machine or device such as a clock or battery runs down, it loses power, or if you run it down, you cause this to happen.

These batteries can be recharged when they run down. 这些电池电量用完时可以再充电。

You'll run the battery down if you leave your car lights on. 你要是让车灯开着，就会把电瓶里的电耗尽。

If a large ship runs down a smaller one, it hits it.

to make yourself tired and ill

Since he took that extra job, he's really run himself down. 自从他承担了那份额外的工作，他就真的把自己累倒了。