I know better than to lend him any money.我知道不该把钱借给他.I know better than to do such a thing.我不会糊涂到干出这种事情来.The boy is old enough to know better.这个男孩已经长大知道好歹了....

know better的音标：know better的英式发音音标为：[nəʊ 'betə]know better的美式发音音标为：[noʊ 'bɛtɚ]...

更明白事理，没愚蠢到…...