Reasons for Wanting to Sleep When Reading 为什么一拿起书就犯困？

许多人都有睡前阅读的习惯，不只是因为他们是书虫，还因为阅读的助眠功效实在太赞了。你可曾好奇过，为什么自己一看书就犯困呢？

You've finally tucked yourself into bed and cracked open the detective novel you've been waiting all day to get back to. Three pages later， you're fighting a losing battle against two suddenly very heavy eyelids.

You  wer e  wide  awak e  m ere minutes ago， and the protagonist just uncovered a promising new lead in the case. So， what gives？

As  the  BBC's  Science  Focus explains， the coziness of your covers could  be  working  against  you . People usually try to read in a quiet， comfortable atmosphere， and those conditions happen to be ideal for sleep. Reading also eases your mind and draws its focus away from whatever preoccupations might otherwise keep you awake.

你终于上了床，打开那本你想了一天的侦探小说。（剩余1846字）