农夫与蛇的英文版简短版本可归纳为以下6句：

发现冻僵的蛇

A farmer found a snake frozen in the snow, its body stiff and covered with a thin layer of ice.

农夫的善举

Despite the cold, he carefully picked up the snake and placed it in his warm coat, hoping to save it.

蛇的本能反噬

The snake, revived by the warmth, instinctively bit the farmer, causing fatal injury.

农夫的悔恨与结局

As he lay dying, he exclaimed, "I saved your life, yet you did not repay me. You must die!" and was killed by the snake.

故事的寓意

The tale conveys the moral that "the greatest kindness will not bind the ungrateful," highlighting the danger of helping those who will betray you.