troopern.
英 'truːpə | 美 'trupɚ
中文n. 骑兵；骑警；伞兵；部队运输船\nn. (Trooper)人名；(英)特鲁珀
骑兵；骑警；伞兵；部队运输船
n. (Trooper)人名；(英)特鲁珀
词根词源
trooper (n.)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.
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