Never have sinned is the unpardonable sin.

从没犯过罪，是为了不可宽恕之罪。

youdao

The one unpardonable sin of nature is to stand still, to stagnate.

自然界最不可饶恕的罪行就是驻足不前，淤滞停止。

youdao

Even some unpardonable sin, we do not have the right to deprive them of their dignity as human beings and rights.

即便是万恶不赦，我们也没有权利剥夺他们作为人的尊严和权利。

youdao

Perhaps the most unpardonable sin: 50% of smartphone users admit to checking Facebook while at a movie.

CNN: Smartphone users check Facebook 14 times a day