Through his hard life, he has grown up from boy to man.

经过艰苦的生活，他已从一个男孩成长为一个男人。

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Some parents believe a boy must learn to stand up and fight like a man.

一些家长认为一个男孩必须学会像男子汉一样奋起战斗。

《柯林斯英汉双解大词典》

He called down to the boy again, "Hello, young man!"

他又一次朝下面的男孩喊道：“你好，年轻人！”

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When the car was ready, the man and the boy stood by to watch him drive it off."

当车准备就绪，站在一旁的男人和男孩“

耶鲁公开课 - 1945年后的美国小说课程节选

The man and the boy didn't say anything while he tried to start it.

在他准备开动时,那男人和男孩一言不发。

耶鲁公开课 - 1945年后的美国小说课程节选

But in contemporary society, we have trouble talking about the obvious: The transition from boy to man is a risky endeavor, and there can be a lot of collateral damage.

CNN: The overwhelming maleness of mass homicide

"It was clear to me he had made the transformation from a boy into a man and a leader prepared to make the ultimate sacrifice for his country, " Littrell said.

WSJ: Prayer book has 150-year history with NY warriors

By the sixth form, he had gone from a quiet studious boy to a popular outgoing young man, known among friends as the life and soul of a party.

BBC: Obituary: Philip Russell