一些研究人员假设，腺苷与大量位点的累积结合导致了睡眠的开始。

Some researchers have hypothesized that it is the cumulative binding of adenosine to a large number of sites that causes the onset of sleep.

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大量使用媒体设备会缩短睡眠时间，从而干扰睡眠。

Heavy media use interferes with sleep by reducing sleep duration.

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青少年每天需要8-10个小时的睡眠，因为他们需要大量能量来长成成年人的身体。

Teenagers need 8-10 hours of sleep a day because they need lots of energy to grow into their adult bodies.

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