词Depth and particle size were primary and secondary environment variables that influence the community structure of brachyuran crabs in the present geographic region.
深度与沙粒粒径大小，分别为影响调查区域内螃蟹群聚结构之主
与次
。
Depth and particle size were primary and secondary environment variables that influence the community structure of brachyuran crabs in the present geographic region.
深度与沙粒粒径大小，分别为影响调查区域内螃蟹群聚结构之主与次。
声明：以上例句、词性分类均由互
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