They live a life of sin.他们过着不道德的生活。
It's a sin to waste food.浪费食品是一种罪过。
Lying, stealing, dishonesty and cruelty are sins.说谎、偷窃、不诚实和残忍都是罪孽。
Being late is an unforgivable sin round here.在这里迟到是一种不可原谅的失礼行为。
It's a sin to be indoors on holiday.假期中呆在家里实在是罪过。