He couldn't help but frown at the confusing instructions.

他忍不住对那些令人困惑的指示皱眉。

Frown at it and it frowns at you.

朝它皱眉，它也朝你皱眉。

I saw Mr. Lloyd smile and frown at the same time.

我看到劳埃德先生微微一笑，同时又皱起眉头来，

Life is like a mirror: Frown at it and it frowns at you; smile, and it smiles too.

生活就像一面镜子：你朝它皱眉它就也不给你好脸色，你朝它微笑它也会以笑还之。

World is like a mirror, frown at it and it frowns at you , smile and it smiles too.

世界就像一面镜子，你对它微笑它也会对你微笑。

He slipped into the nearest of them as inconspicuously as he could and prepared to frown at the yet later comers whenever they should arrive.

他尽可能不惹眼地溜到了最近的椅子旁边，打算对后来的人皱眉头——不管是谁。