There is no trap so deadly as the trap you set for yourself.

安全生产是煤炭行业的生命线，任何时候都不能放松。

What's left out is as important as what's included.

Man can only be free through mastery of himself.

有时，生活中最困难的部分不是痛苦，而是等待。

Technology innovation is the key to solving the trilemma of energy security, environmental protection and economic development.

大自然是一位了不起的老师，只要我们耐心观察，她就会向我们揭示她的秘密。