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释义:天之险在于高不可升,地之险在于山川丘陵。王公设险以保卫国家,险的功用非常大。
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
Innovation in gas extraction isn't just about efficiency—it's about ethics.
电影是时间的艺术,它能够捕捉瞬间的永恒。