There is a lot of research showing we are meant to be asleep at night when darkness falls and melatonin rises and when the sun rises the melatonin is blocked by the sun.
大量研究表明，夜幕降临后人体褪黑激素的分泌量会增多，这时我们应该睡觉，而太阳升起之后褪黑激素的分泌会受到抑制。
The room of utter darkness, the light of fire rises again, that is send forth on the sword of Xin Zhui Mu of order some ray of light.
漆黑的房间，火光再起，那是辛追木剑上散发出来的点点光芒。
The room of utter darkness, the light of fire rises again, that is send forth on the sword of Xin Zhui Mu of order some ray of light.
漆黑的房间，火光再起，那是辛追木剑上散发出来的点点光芒。
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