If allergies have your sinuses blocked, you may be feeling more tired and cranky.
如果过敏症让你的鼻子塞住了，你会更容易感到累和不安。
Why is it that two people can be equally sleep-deprived, and yet the next day one person ends up feeling more tired and listless than the other?
为什么两个人都有相同程度的睡眠不足（睡眠剥夺 sleep-deprived），然而第二天一个人会比另一个人觉的更疲劳、无精打采呢？
People who snore loudly, have difficulty falling asleep, or often wake up feeling tired may have more to worry about than dozing off at work.
鼾声大，入睡困难，或者醒来后经常感觉疲劳的人，可能要担心比工作时打瞌睡更严重的问题。
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