"look who's talking!" “别光说别人，看看你自己！”（非正式）
英文释义
Informal expression accusing a person of doing something for which they have criticized someone else.
I said "look who's talking! when my lazy son ridiculed his friend for not studying hard at school."
当我的懒惰的儿子嘲笑他的朋友学习不用功时，我说：“别光说别人，看看你自己！”