神奇数字150表明，我们社交网络的规模受限于大脑的容量。
The magic number 150 suggests that the size of our social networks is limited by the size of our brains.
Stop acting as if life is a rehearsal. Live this day as if it were your last. The past is over and gone. The future is not guaranteed.
海洋连接着我们所有人，它的健康是我们共同的责任。
小说是谎言中的真相。
数学中最深刻的思想往往来自最简单的问题。
Green and low-carbon development is not a multiple-choice question, but a must-answer question.