人不可貌相的经典语录
Don't judge a person based on appearance.
Don't judge a book by its cover! 如果非要按人来译：Don't judge a person by his/her look
Don't(ever) judge a person by his appearence/look 形象一点来说就是You can't judge a book by its cover! 你可以自行选择！ 谢谢
简明汉英词典 人不可貌相 You can't judge a book by it's cover.