释义：
know better than to 知道的比……多
know better than 表示“知道的比……多”，“最起码知道……”，换句话说就是“没有那么蠢”。than 后面可以接名词或 to+动词。
例句：
You know better than that.
你不至于那么蠢。
I know better than that.
该懂的我都懂了。
Of course, she knew better than to say this to her husband.
当然，她可没有蠢到把这些告诉她丈夫。
对话：
A: Your children are very well behaved.
你的孩子很有教养。
B: They know better than to act badly.
他们已经过了胡闹的年纪了。
