The only way to learn mathematics is to do mathematics.
学习数学的唯一方法就是做数学。
Let us try to teach generosity and altruism, because we are born selfish.
"We don't get to choose our own hearts. We can't make ourselves want what's good for us or what's good for other people."
宇宙不仅比我们想象的更奇怪，它比我们能想象的还要奇怪。
每一帧都很重要，每一个剪辑都应该在推进叙事中发挥作用。