1630s, "soldier in a cavalry troop," from troop (n.) + -er (1). Extended to "mounted policeman" (1858, in Australia) then to "state policeman" (U.S.) by 1911.
实用例句
1. Once long ago he had considered becoming a state trooper.
很久以前他曾考虑过当州警察。
来自柯林斯例句
2. "Where to, Corporal?" asked Trooper Fane respectfully.
“下士，您去哪里？”骑兵费恩毕恭毕敬地问道。
来自柯林斯例句
3. He became a trooper in the Royal Tank Regiment.
他当上了皇家坦克团的装甲兵.
来自《简明英汉词典》
4. The trooper overstayed his leave.
这个骑兵超假了.
来自《现代汉英综合大词典》
5. The young state trooper didn't say anything to him.
