以物易物、互通有无的倾向是人类共有的,也是其他动物所没有的。
If ease of use was the only requirement, everyone would still be riding tricycles.
The role of the infinitely small in nature is infinitely large.
La narrativa es un espejo que refleja no solo lo que somos, sino lo que podríamos llegar a ser.
钢铁的强度只与制造它的人的强度相匹配。