来源
Don't judge a tree by its bark.不要以树皮来判断一棵树.
Don't judge a dog by its bark.不要以吠声来判断一条狗.
字面意思自然是
人不可貌相
相关的还有
Don’t judge a book by its cover.书的价值不在封面.
Don’t judge by appearance.不可以貌取人.