He seemed so young, a mere boy.

他看来那么年轻，只是个孩子。

《牛津词典》

So the boy smiled.

于是男孩笑了。

youdao

youdao

So I know.I saw the whole thing from the beginning, from the very day when the little boy here met with the accident."

VOA: special.2010.05.15

And, yet, think about the qualities of sound that are so different between "across the lines of straighter darker trees" and "I like to think some boy's been swinging them."

想想这音律的特别之处,这两句有很大的区别,“穿过排列成行的挺直黑黑的树“,我总以为有个孩子把白杨“荡“弯了“

耶鲁公开课 - 现代诗歌课程节选

We didn't lose so much money that I say to myself "Boy that was a real mistake."

也没损失太多钱,我跟自己说“那就是个失误“

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

But it's frustrating and unfair that, to do so, Boy Scout leaders also will have to affirm discrimination against adult scout leaders.

CNN: Boy Scouts are lost in the woods

"The Kite Runner" was originally scheduled for a November 2nd release, but the opening was delayed six weeks so the boy actors could leave Kabul.

NPR: Child Actors Spirited Out of Afghanistan

The report says a third of fatalities and serious injuries on the roads are caused by so-called boy racers.

BBC: Health funding shortfall appeal