These people are animals and what they did was unforgivable.

这些人是畜生，他们的所做所为是不可原谅的。

Anybody against it is an unforgivable sinner against the earth.

任何反对它的人都是反对地球，是不可原谅的罪人。

Is it making mistakes unforgivable?

那么，犯错是不可原谅的吗？

Being late is an unforgivable sin round here.

迟到在这里是一种不可原谅的失礼行为。

It was stupid and immature. And it was unforgivable.

它是那么愚蠢和不成熟，并且它不可原谅。