know better than 雅思

He should have known better than to leave her for that young girl. Hell hath no fury like a woman scorned.

他早该知道能为了那个年轻女孩离开她，女醋时太可怕了。

It seems unnecessary to have watchmen like me on the Wall in the future when people along the Wall know better than to further vandalize the rampart.

过，照现在形势来看，我觉得将来最好是再需要设我这样长城保护员了，那就说明长城沿线保护长城识已经到了相当高境界了，为破坏长城现象再也没有了。