Your room should be quiet and sufficiently dark, because darkness prompts the pineal gland to produce melatonin, the hormone that regulates circadian rhythms (your 24-hour body clock).
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The waters of the Arctic are particularly perilous for drilling because of the extreme cold, long periods of darkness, dense fogs and hurricane-strength winds.
对于海上钻探，北极的水域特别危险，因为极端寒冷，长时间的黑暗，密雾，以及飓风强度的大风。
If I were a boy again, I would practice perseverance more often, and never give up a thing because it was hard or inconvenient. If we want light, we must conquer darkness.
假如我又回到了童年，我做事要更有毅力，决不因为事情艰难或者麻烦而撒手不干，我们要光明，就得征服黑暗。
Because I was not cut off before the darkness, [neither] hath he covered the darkness from my face.
我的恐惧，不是因为黑暗，也不是因为幽暗蒙蔽我的脸。
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