The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.

可持续性不是一种趋势——它是商业的新标准。

The key to survival is not just physical strength, but mental resilience.

能量守恒定律不仅是一条经验法则，更是思维的必然要求。