Katie then says, " But you know what they say, better the devil you know, than the devil you don't." " You know what they say" - that expression we use before a proverb, and a proverb (proverb) is a famous saying or expression.

凯蒂然后说， “但是你知道他们说什么，你知道的魔鬼比你不知道的魔鬼要好。 ” “你知道他们说什么” - 我们在谚语之前使用的表达方式，谚语（谚语）是一句名言或表达。