Other people say that REM sleep is the only essential phase of sleep, so core sleep isn't necessary.
所以相对来讲，是否保证核心睡眠是没有必要的。
For example, you might have a core sleep period from 2-5am, and then three or four shorter naps spread throughout the day.
例如，您可以安排一个从凌晨2点到5点的核心睡眠阶段，然后其余的时间进行3到4次小睡。
This isn’t just my opinion but also the observation of others who’ve tried including core sleep from the beginning — oversleeping is very common, which makes adaptation take longer.
这也不只是我的意见而且也是来源于很多的案例观测的结论。
A lower temperature lowers your body's core temperature and signals it's time for sleep.
温度降低会使你身体的整体温度降低，给它睡觉时间到了的信号。
Valued added strategiesincrease loyalty by providing customers with more than just the core product; for example, for hotels, offering more than just a place to sleep.
价值增加策略通过为顾客提供核心产品之外的服务来提高消费者忠诚度；
Keep cool - you fall asleep faster and sleep better if the bedroom is cooler. A lower room temperature lowers core body temp, and helps you go to sleep.
温度低一点—如果卧室温度低一点，那你能更快入梦，睡眠质量也会更好。卧室里的温度低一点可以降低身体活动的温度，从而有助你入睡。
Based on all of the research on this topic, we need to make sleep a core value at home and work.
根据有关这一主题的各种研究显示，我们需要在家庭和工作中把睡眠作为一个核心价值。
Czeisler: no one really knows what the function of sleep is, although the leading hypothesis is that sleep's core function relates to the repair and reorganization of brain cells.
切斯勒：没有人真正了解睡眠的功能是什么，尽管最主要的假设是睡眠的核心功能和大脑细胞的修复和重组有关。
At the core of me, I'm a one-on-one player. I'd do that in my sleep.
而我的核心就是一对一，我甚至在睡觉时也那么做。
The bath increased their core body temperature, which then abruptly dropped once they got out of the bath, readying them for sleep.
热水澡提高了身体中心体温，在洗好澡后又迅速下降，为她们做好了睡眠的准备。
The bath increased their core body temperature, which then abruptly dropped once they got out of the bath, readying them for sleep.
热水澡提高了身体中心体温，在洗好澡后又迅速下降，为她们做好了睡眠的准备。
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