我们知道,人活在世界上要干的事太多了。特别是具有热爱人类,热爱和平,热爱大自然,热爱民族,热爱祖国,向往美好幸福生活的人,具有强烈责任心,具有正义感,紧迫感的人,要干的事,真是太多了。但人的生命是有限的。同时人类的延续是无限的,社会的发展是无限的,大自然的变迁是无限的,人类进步是无限的,宇宙更是无限的。人类在有限的生命过程之中,首先必须有了衣、食、住、行、用,娱乐休息才能为社会做事。而许多事的作为, We know that there is too much to do in the world. In particular, those who have a strong sense of responsibility, a sense of justice and a sense of urgency who have love for mankind, love peace, love nature, love the nation, love the motherland and look forward to a beautiful and happy life want so much to do. But human life is limited. At the same time, the continuation of mankind is unlimited. The development of society is infinite. The changes of nature are infinite. The progress of mankind is infinite and the universe is infinite. In the course of a limited life, mankind must first have clothing, food, shelter, transportation, entertainment and rest to work for the community. As a result of many things,