Petty officers are the backbone of a navy.

军士是海军的骨干。

柯林斯例句

He resented bitterly the authority of the petty officers.

他讨厌那些趾高气昂的小军官.

辞典例句

And there were 40 officers , 260 petty officers, 538 soldiers, and 332 students.

干部40名,士官260名, 义务兵538名, 学员332名.

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