羊有跪乳之恩，鸦有反哺之义。
羊羔有跪下接受母乳的感恩举动，小乌鸦有衔食喂母鸦的情义。
从长远来看，未来是由乐观主义者决定的。成为一个乐观主义者，不是要忽视现有的许多问题，而是想象怎么才能改善我们解决问题的能力。
What's terrible is to pretend that second-rate is first-rate. To pretend that you don't need love when you do; or you like your work when you know quite well you're capable of better.
苏联人是一个永远在等待的人——等待配给，等待命令，等待终结。
The transformation of the coal industry must rely on technological leadership, and green development is the only way forward.
Don't be afraid to take risks. The biggest risk is not taking any risk at all.