He is a smart boy.

他是个聪明的男孩。

He is a smart boy.

他是个小机灵鬼.

Our monitor is a very smart boy. We all believe in him.

我们的班长精明强干，我们都很信任他。

Feng is a smart boy, who learned much faster than others and often find some short-cut to do any thing.

风是一个非常聪明的孩子，他学得比其他任何人都要快，并且经常能够发现捷径去完成一些事情。