出自《海国图志·卷首》。地气和天时变化了,那么历史的体例也应随着时代的变化而变化。
I write to understand, to grasp the reality that escapes me.
当市场下跌时,你轻易的将好东西打折变卖,但是一旦市场向上,再想买回来,难之又难。
Innovation in quarrying isn't just about new technology - it's about new thinking.