But one big difference is that very few of them suffer from insomnia – which means having difficulty falling asleep and staying asleep.

但是一个很大的不同就是他们当中很少有人会有失眠的问题，失眠就是入睡和安睡有困难。

Lots of people have difficulty falling asleep because their mind is racing thinking of a zillion different things going on in their life.

很多人都会失眠，因为他们的大脑不断思想生活中发生的事。

Insomnia is difficulty falling asleep, difficulty staying asleep, poor sleep quality or some kind of combination of those symptoms.

失眠是难以入睡、难以入睡、睡眠质量差或这些症状的某种组合。