He served as a captain in the army.

他曾是一名陆军上尉。

《牛津词典》

Maybe I, as a captain, was too reluctant.

也许，作为队长，我过于懈怠。

youdao

He took on the responsibility as a captain and led the team in the rescue.

他承担起队长的责任，带领队员进行拯救行动。

youdao

Then,as the boat was carried to the top of a great wave, the captain looked across the water.

VOA: special.2010.03.06

He refers to himself with a variety of names and titles, as captain this, colonel that, general that.

他用许多称号来称呼自己,例如 某某上尉,某某上校,某某将军

耶鲁公开课 - 欧洲文明课程节选

A captain's wife often acted as a nurse, which Eleanor did.

VOA: special.2011.07.06

So is this the end for Ganguly as a captain and a Test player?

BBC: SPORT | Cricket | International Teams | India | Ganguly gone?

"As a captain with the team, John Terry has displayed extremely positive behaviour, " read Capello's statement.

BBC: John Terry stripped of England captaincy by Capello

Ryan's job is undoubtedly safe, but Holmes's behavior, particularly as a captain, raises serious questions.

WSJ: Miami Loss Grounds Jets for January