·2,447,543篇论文数据，部分数据来源于NoteExpress
The species and their occurrence were found out basically through the systematic investigation on the arthropod community in seed field of alfalfa in Jingtai County, Baiyin, China.
对景泰苜蓿种子田节肢动物群落进行了系统调查，基本查清了景泰苜蓿种子田节肢动物的种类及其组成。
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