常见例句用作名詞 (n.)Nigeria is the world's largest cowpea producer.尼日利亞是世界上最大的豇豆生産國。Studies on Yield Loss and Dynamic Economic Threshold of Cowpea Aphid Aphis craccivora Koch on Cowpea, Vigna sp.豆蚜危害豇豆損失率及動態經濟閾值研究。 返回 cowpea