学习数学的唯一方法就是做数学。
The only way to learn mathematics is to do mathematics.
Liberal democracy may constitute the "end point of mankind's ideological evolution" and the "final form of human government," and as such constituted the "end of history."
我认为有女性讲故事者很重要。
警惕物质诱惑，保持内心独立。
自然法，即lexnaturalis，是由理性发现的命令或一般规则，它禁止一个人做对他的生命有害或夺走维护生命的手段的事情。