foul and fair 在任何情况下，不管顺利或困难

He's been a good friend through foul and fair.

他一直是一位同甘共苦的好朋友。

He had promised that he would be with his sister through fair and foul.

他保证不管在什么情况下都要和他妹妹在一起。

Fair is foul, and foul is fair.

美即是丑，丑即是美。

fair /feə/ adj. 公平的;美丽的，白皙

Faint heart never won fair lady.

懦弱的人永远不会博得美人的欢心。

foul /faʊl/ adj.邪恶的;难闻的，有恶臭的;下流的

If you describe something as foul, you mean it is dirty and smells or tastes unpleasant.

...foul polluted water...恶臭的脏水