I was a naval officer, lieutenant junior grade.

我曾是名海军军官，中尉军衔。

《柯林斯英汉双解大词典》

"As acting CO of Team Blue, I am hereby granting you a field commission to the rank of Lieutenant, Junior Grade, " Kurt told Fred.

“作为蓝队的代理指挥官，我授予你一项战场委任，即刻成为初级上尉军衔，”库尔特告诉佛瑞德。

youdao

During the time I was a first lieutenant at Seymour Johnson Air Force Base in North Carolina, the junior officers challenged the senior officers to see who would donate the most blood.

当我在加州北部西摩·约翰逊空军基地任中尉时，有下级军官向上级军官挑战看谁献血最多。

youdao

We see junior officers, captains and mid-level officers, majors and lieutenant colonels leaving the military in larger numbers than, than we would expect or that would be healthy.

NPR: U.S. Military Faces Strain in Achieving Iraq Plan