嗯， 阻碍就在这： 因为当我们摆脱了这一具腐朽的皮囊以后， 在那死的睡眠里，究竟将要做些什么梦，那不能不使我们踌躇顾虑。

To die- to sleep. To sleep- perchance to dream: ay, there's the rub! For in that sleep of death what dreams may come When we have shuffled off this mortal coil, Must give us pause.

youdao

大脑是一个让人迷惑的器官，就像生和死、意识、睡眠和其他更多的东西，这都是人类关于人脑至今也没有解开的谜团。

The brain is a befuddling organ, as are the very questions of life and death, consciousness, sleep, and much more. Here's a heads-up on what's known and what's not understood about your noggin.

youdao

We're going to have to refine it to deal with the obvious fact that you're not dead all the times when you're unconscious and not dreaming.

以便适应人在无意识和无梦睡眠时,并没有死这个显而易见的事实。

耶鲁公开课 - 死亡课程节选