Now let's return to Felix. He's in his violent death spin, remember? 现在让我们回到费利克斯。他还在剧烈地旋转中，感觉要死了，还记得吧？ Fifteen seconds into the jump, he's going at 844 miles an hour -- or as the physics majors know -
So let's start off by defining some terms. What is regret? 首先让我们定义一下几个词语。什么是后悔？ Regret is the emotion we experience when we think that our present situation could be better or happier if we had done s
What I'm really curious about is if one day, 我真正好奇的是会不会有一天， it will be possible to repair, rebuild and augment our own bodies with stuff we make in the kitchen. 人们有可能修复、改造、强化我们自己的身体，用到的只是我们厨房里的材料。
