I think the most important thing for mankind is fire. Fire can ripen food. It can keep us healthy.Fire is needed to boil water, and it is also because of fire that we humans can live for such a long time.If there is no fire in this world, you may need to think about where you are now.Fire can kill some low-grade bacteria.People use fire every day. We need fire.
相关作文: 学溜冰、乐于助人的朋友、收拾书包和书桌、瑞雪丰年、学雷锋做好事、拔牙记、关于夏天的小学作文、齐心协力的故事、三角梅、我喜爱的桂花