结果表明，胡敏酸各级分随级分数的增大芳构化度逐渐降低，分子结构趋于简单。
The resu lts showed that the condensation degree of the fractions decreased and the structure became simpler with the fractional number increase.
结果表明，胡敏酸各级分随级分数的增大芳构化度逐渐降低，分子结构趋于简单。
The resu lts showed that the condensation degree of the fractions decreased and the structure became simpler with the fractional number increase.
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