文明的分布很大程度上是气候刺激的结果。
王一定很不好当。
研究最有价值的部分是看到你的工作转化为现实世界的影响。
The real moral test of a society is how it treats those who are at the dawn of life, the children; those who are in the twilight of life, the aged; and those who are in the shadow of life, the sick, the needy and the handicapped.
