They found that two hours of sitting before a bright screen at night reduced the sleep chemical levels by about 22%.

他们发现，晚上坐在明亮的屏幕前两小时，会使睡眠化学物质水平降低约22%。

youdao

I never understood why some people would work late into the night and sleep most of their mornings away, but now that I am sitting here, at 1am, listening to the same song on repeat, I get it.

我一直不理解为什么有些人晚上会工作到很晚，然后将早上的大部分时间用来睡觉，但是现在，已经凌晨1点了，我坐在这里，反反复复听着同一首歌，终于明白了。

youdao

If you're falling asleep as soon as your head hits the pillow (or while sitting at your desk), that's a symptom of sleep deprivation.

如果你长期没睡好，你会一碰到枕头就睡着了(或者坐在桌旁就睡着了)，这表明你缺乏睡眠。

youdao

Sitting in the room where the hospital workers also sleep, Kassig stares up at the TV screen, always following with everyone else the news in Syria, image after image of death and destruction.

CNN: Former U.S. soldier aids Syria's wounded

To transition the older ones to sleep at the same time (they share a room) I started sitting between their beds and stretching out my arms so that they can each hold a hand as they fall asleep.

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