I want to bring out the secrets of nature and apply them for the happiness of man.I don’t know of any better service to offer for the short time we are in the world.我想揭示大自然的秘密，用来造福人类。我认为，在我们短暂的一生中，最好的贡献莫过于此了。
——美国发明家爱迪生 g/4VO+rnQYelmqc9i22ZznxyjC5XfOK62M8sm9TQt1esgDeLUsQvTvGr7cXoFokT
