"He did misappropriate the public funds, but there were extenuating circumstances."

"他的确挪用了公款,但有可以轻罪责的情况。"

Nothing can extenuate such appalling behaviour.

这种骇人听闻的行径罪无可恕。

Nothing can extenuate his guilt.

他的罪无法轻。

Nothing can extenuate his crime.

他的罪责无法轻。;他的罪责无法用任何辩解轻。