中心地是总旅行距离最小的点。

I'm not a gangster, I'm not a thug, I'm just a guy who likes to rhyme.

任正非内部讲话稿

Strengthen international cooperation to promote the improvement of technology and management in the coal industry.

不要以虚妄的心伤害自己的本心，不要因外在的因素伤害了自身。