n. a mounted policeman
n. a state police officer
n. 骑兵, 骑警, 伞兵
1. The state trooper helped direct traffic after the accident.
这名州警协助疏导事故后的交通。
2. She wants to become a trooper and serve her community.
她想成为一名警察，服务她的社区。
3. The trooper gave the driver a warning for speeding.
警察因超速给司机发了警告。