稚气

tā hái zhì qì wèi tuō

他还稚气未脱。

He is still childish.

mǎn liǎn zhì qì

满脸稚气

innocent-looking

tā nà lún kuò fēn míng qiě lüè xiǎn zhì qì de xiàng mào

他那轮廓分明且略显稚气的相貌

his clean-cut and boyish look

nà shòu shòu de zhì qì de liǎn shang zuǐ ba liě de dà dà de zuò chū yī fù shǎ xiào

那瘦瘦的稚气的脸上，嘴巴咧得大大的，做出一副傻笑。

His young bony face spread in a great grin.