该句的意思是"懂得，明事理而不至于做......"。可用来对某人做某事表示不满、后悔、劝阻等。 1. You should know better than to go swimming right after eating. 你应该知道饭后不能立即去游泳。 2. You are old enough to know better than to spend all your money on clothes. 你年纪足够大了，应该知道不该把钱全花在买衣服上。 3. I know better than to lend him any money to gamble. 我知道不能借钱给他去赌博。 A: Harry, come here immediately! 哈利，立刻到这儿来！ B: What? 有什么事吗？ A: Don't take that tone with me! I saw you hit your brother. 别给我来这样的腔调。我看见你打你弟弟了。 B: No! He hit me first. 不是的！是他先打我的。 A: I don't care. You know better than to hit him. Go sit on your bed for 10 minutes. 我不管。你知道你不该打他的。去，到你房间床上静坐十分钟。
