单词：bean aphid
bean aphid的用法和样例：
例句
- Studies on Yield Loss and Dynamic Economic Threshold of Cowpea Aphid Aphis craccivora Koch on Cowpea, Vigna sp.豆蚜危害豇豆损失率及动态经济阈值研究。
- blackfly蚋,墨蚊
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