每天名言：大自然的秘密
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.(Thomas Edison , American inventor)我想揭示大自然的秘密，用来造福人类。我认为，在我们的短暂一生中，最好的贡献莫过于此了。(美国发明家 爱迪生)
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