to cause someone in a position of power to lose their job

This scandal could bring down the country's government. 这个丑闻能使政府垮台。

to cause someone to fall down by pushing or kicking the person when they are moving

Suarez was awarded a penalty when Olsson brought him down. 苏亚雷斯被奥尔森绊倒，获判点球。

to reduce the level of something

They've really brought down the price of DVD players. 他们的确降低了影碟机的价格。