root nodule
柯林斯词典
1. N a swelling on the root of a leguminous plant, such as the pea or clover, that contains bacteria of the genus Rhizobium, capable of nitrogen fixation 根瘤
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1. N a swelling on the root of a leguminous plant, such as the pea or clover, that contains bacteria of the genus Rhizobium, capable of nitrogen fixation 根瘤