I don't entirely agree, but I'll let it go at that.

我不完全同意，但也就这样吧。

《牛津词典》

So we can let it go at that.

那我们就这样算了吧。

《新英汉大辞典》

That's enough. Let it go at that.

得了，别再说了。

《新英汉大辞典》

It was no good to provide them with security, insist that they obey the laws, and let it go at that.

FORBES: When Sovereign Default Is The Most Attractive Option

If the GOP ticket will just let it go at that, the chattering class will be proven to be right that national security will not be a prominent issue this year after all.

CENTERFORSECURITYPOLICY: Center For Security Policy

And for the moment at least, it appears that Iran has decided to let Hamas go down.

CENTERFORSECURITYPOLICY: Iran's Gaza diversion