常见例句用作名词 (n.)Nigeria is the world's largest cowpea producer.尼日利亚是世界上最大的豇豆生产国。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。 返回 cowpea