如果没有目标，分析就是漫无目的、一文不值的。

My life I never held but as a pawn to wage against your enemies.

I’m not trying to be perfect, I’m just trying to be better.

In mathematics, the art of proposing a question must be held of higher value than solving it.

君主是臣子的纲常，父亲是儿子的纲常，丈夫是妻子的纲常。

煤炭是我国的主体能源，在相当长时期内仍将是我国能源安全的基石。