Your brain and your nervous system need glucose to work: that means walking, speaking, stretching, typing - any activity requires this fuel.
你的大脑和中枢神经系统的工作需要葡萄糖：即走路，说话，拉伸，打字-任何活动都需要这种燃料。
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Other factors include changes in solar activity, the increased water vapour that can be held by warmer air and soot and other particles produced by fossil fuel and wood burning in Asia.