said in order to tell someone that you understand why they are doing something and that you agree with the reason for doing it

I don't blame him for getting angry - she's being really annoying. 我理解他生气的原因——她实在太烦人了。

I don't blame her for taking a day off - she really needed a break.

"I decided to leave." "I don't blame you!" “我决定离开。” “我理解。”

"I told him I'd had enough and he'd have to find someone else to do the work." "I don't blame you at all."

"I was furious with her." "I don't blame you - I'd have felt the same."

See also: blame verb