人类是绝望的动物。
The beauty of mathematics lies in its simplicity and depth.
扬撒糠屑迷了眼，也会让天地四方都变了位置；蚊虫叮咬皮肤，也会让人通宵都不能安眠。
The only way to have a friend is to be one.
The deepest principle in human nature is the craving to be appreciated.
The energy transition is not just about replacing one energy source with another; it's about transforming the entire energy system.
随着劳动分工和机械应用的扩大，工人之间的竞争加剧，他们的工资也越来越低。