数学的本质在于它的自由。
The essence of mathematics lies in its freedom.
在进入交易之前,一定要有一个计划。
释义:不考虑在安逸的环境中要想到危难,用节俭来戒除奢侈,不使自己的道德处于深厚的境界,不能使自己的情欲战胜物质欲望,这就像砍伐树木的根却想要树木长得茂盛,堵塞水的源头却想要水流得长远一样荒谬。
能源的未来在于传统能源与可再生能源的融合,而非对立。
It is not the benevolence of the employer that determines the wages of labor, but the competition among employers.
The best way to predict the future is to create it.