英语单词大全

ulmin是什么意思 ulmin怎么读

英式：['ʌlmɪn] 美式：['ʌlmɪn]

ulmin单词基本解析：

n.棕腐质，赤榆树脂
n. 赤榆树脂(棕腐质)

ulmin变化用词：

ulmin英英释义：

ulmin中文词源：

ulmin用法和例句：

ulmin

The content of soil ulmin,and the entire nitrogen have slightly rise;

土壤有机质、全氮含量略有上升；

ulmin compound

棕腐质化合物

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