【正文】
is getting more and more unhealthy。 I cant help trying to offer my idea and my trivial efforts to look for the answer of the question. As the ancient Greek oracle goes: know thyself. I think in answering this abovementioned question, this precondition is also very important. Who are we? This is a question, which should be answered not only by those specialists, but also by every one of human beings. Some people may proudly say: we are the masters of nature. It is true that the idea of man can conquer nature has dominated peoples mind for years, and it is true, man has kept acting like a master and doin