钱有富余的时候,可以到银行把它存起来;东西多了用不完时,可以放在仓库里保管起来,唯独有一样东西不太好保存,那就是光和热。 保存太阳的光和热有什么用?太有用了。当夏天热得人汗流浃背时,当冬天冻得人浑身发抖时,有没有人幻想过把夏天太阳多余的热量“匀一点”出来,到冬天再用呢?肯定有人想过,只是不知道怎么个“匀”法。 When money is available, you can go to the bank to save it; when things are over for use, they can be stored in a warehouse. Only one thing is not so well preserved, that is light and heat. What is the use of saving the sun’s light and heat? When the summer was so hot and sweaty, when the winter was cold and shivering, did anyone ever fancy “extra” the excess heat from the summer sun and use it again in the winter? Certainly some people had thought about it but just did not know how “Uniform” method.