他们发现，这种粘液是一种蛋白质混合物，一部分带正电，一部分则带负电，且含有大量钙镁离子。
What they found was a mixture of proteins, some positively charged and some negatively charged, and a lot of calcium and magnesium ions.
他们发现，这种粘液是一种蛋白质混合物，一部分带正电，一部分则带负电，且含有大量钙镁离子。
What they found was a mixture of proteins, some positively charged and some negatively charged, and a lot of calcium and magnesium ions.
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