American botanist, agricultural chemist, and educator who developed hundreds of uses for the peanut, soybean, and sweet potato, prompting Southern farmers to produce these soil-enriching cash crops.是什么意思_American botanist, agricultural chemist, and educator who developed hundreds of uses for the peanut, soybean, and sweet potato, prompting Southern farmers to produce these soil-enriching cash crops.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句