Innovation in coal technology is just as important as innovation in any other energy sector.

We are what we think.

知识越少越准确，知识越多，疑惑也就越多。

严厉的家庭没有凶悍的奴仆，而慈爱的母亲却会有败家的儿子。

文学是社会的镜子，反映它的美和缺陷。