mr. wang is a retired worker. he loves flowers very much. it was cold outside in winter, so he thought his flowers might be cold. he started the fire to heat a pot of water. after the water was boiling, mr. wang watered the flowers with it. he thought happily, 'now it will be warm.' but after a while, to his surprise, all the flowers died. mr.wang felt worried. from the story we know: no matter what we do, we must follow the natural rules.