同一元素的原子在质量和性质上是相同的。
抽象的目的不是模糊,而是创建一个新的语义层次,在这个层次上可以绝对精确。
A love that makes breath poor, and speech unable.
The city is the ultimate expression of our civilization.
如果人们不能相信他们的政府做它该做的事,保护他们和促进他们的共同福利——那我们就完全失败了。
The international system is inherently competitive, and states are constantly trying to outmaneuver each other.
心如止水,世间万事皆可平。