你知道一个人在坐着不动的时候，血液中应该含有多少水份、多少盐分和多少其他元素来维持一定的比重吗？
Can you tell me how much water, how much salt, how much of each different element there should be in your blood to maintain its proper specific gravity if you are leading an ordinary sedentary life?
你知道一个人在坐着不动的时候，血液中应该含有多少水份、多少盐分和多少其他元素来维持一定的比重吗？
Can you tell me how much water, how much salt, how much of each different element there should be in your blood to maintain its proper specific gravity if you are leading an ordinary sedentary life?
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