“挺起胸膛”用英语如何翻译？

thrust out one's chest
swell one's chest

to stick (throw) out one's chest Chinese & English Bilingual Example Sentences

挺起胸膛
He swelled his chest outimportantly.
他神气地挺起胸膛。
The boy confidently puffed out his chest.
男孩信心十足地挺起胸膛。
Thrust out your chests, men! Look like soldiers!
男子汉们,挺起胸膛来！要像个战士！
He who laughs at crooked men should need walk very straight.
[谚]要笑别人驼背，自己就要挺起胸膛走路。