“你脸真脏啊，快去照镜子看看。”
【英文对比翻译】
Chinese Style ——What a dirty face ! Look at the mirror quickly.
American Style —— What a dirty face ! Look in the mirror quickly.
【点评】
Look at the mirror =look at the “mirror” itself.
Look in the mirror= look in the mirror, that's where the image of you is.