Learning is not a passive process; it involves the active construction of knowledge.

生命是一段旋律，让它变得美丽。

"The measure of a civilization is how it treats its weakest members."

引力波的探测为我们打开了一扇观察宇宙的新窗口。

The nightmare thought is that frightening people is the best way to get work out of them, and that somehow the crueler the environment, the more people will rise to the challenge. You want to think, who would you like as your ideal dad? And your ideal dad is somebody who is tough but gentle. And it's a very hard line to make. We need fathers, as it were, the exemplary father figures in society, avoiding the two extremes, which is the authoritarian disciplinarian on the one hand, and on the other, the lax, no-rules option.

确保和平的最佳方式是维持主要国家之间的权力平衡。

每个孩子都应该玩泥饼、捉蚱蜢、玩水虫、养蝌蚪、抓青蛙、玩泥龟、采接骨木果、摘野草莓、捡橡子、采栗子、爬树、涉溪、赏睡莲、观察土拨鼠、蝙蝠、蜜蜂、蝴蝶，养各种小动物，在干草场玩耍，捡松果，滚石头，玩沙子，抓蛇，采越橘和胡蜂窝；任何被剥夺了这些乐趣的孩子，都被剥夺了教育中最美好的部分。