The magic number 150 suggests that the size of our social networks is limited by the size of our brains.
神奇数字150表明，我们社交网络的规模受限于大脑的容量。
大自然是一位了不起的老师，只要我们耐心观察，她就会向我们揭示她的秘密。
"The world begins at a kitchen table. No matter what, we must eat to live."
