mow down
phrasal verbmow somebody  down 
- to kill somebody using a vehicle or a gun, especially when several people are all killed at the same time(用交通工具或枪)杀死,撂倒,扫倒 - The gunmen opened fire, mowing down at least seven people.持枪者开火了,砍倒了至少七个人。 
 
- The gunmen opened fire, mowing down at least seven people.