through thick and thin 不顾艰难险阻，历经千辛万苦

【例句】
Our company has survived through thick and thin, and we'll be able toget through this ordeal as well.
我们公司经历了艰难困苦，我们也能度过这场磨难。

I will go on loving James through thick and thin no matter what happens.
不管发生什么，不管经历多少艰辛，我都会一直爱着詹姆斯。