I know we haven't always seen eye to eye, but I've been there for you through thick and thin.

我知道我们并不总是一致，但我在艰难和顺利的时刻都支持你。

Friendships built on trust will last through thick and thin.

建立在信任上的友谊会在艰难和顺利的时刻持续。

She promised to stick with him through thick and thin, no matter the challenges they faced.

她承诺无论面对怎样的挑战，都将无条件支持他。

Their marriage has survived through thick and thin; they've truly become partners in everything.

他们的婚姻经历了艰难和顺利，真的成了生活中的伙伴。

It's comforting to know that my family will always support me through thick and thin.

知道我的家人会在艰难和顺利的时刻支持我，这让我感到安心。