在没有生命力的帮助下合成尿素是我们这个世纪最重要的发现之一。
我不相信运气,我相信准备。
It is indeed an opinion strangely prevailing amongst men, that houses, mountains, rivers, and in a word all sensible objects, have an existence, natural or real, distinct from their being perceived by the understanding.
君主所凭借着驱使臣下的,只有尚贤一种方法;臣下用来侍奉君主的,也只有仁义一条途径。