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煤炭不是问题所在,问题在于我们如何使用它。解决方案在于更清洁的技术和更好的利用。
The study of the mind must be based on direct observation.
Nothing is a waste of time if you use the experience wisely.
It has been said that man is a rational animal. All my life I have been searching for evidence which could support this.
Running a business requires social responsibility. We must not only pursue economic benefits but also pay attention to food safety and environmental protection.