D-甲硫氨酸

Researchers Genetically Modify Corn to Increase Nutrition Researchers in the United States say they have discovered how to genetically engineer corn to produce a kind of amino acid usually found in meat. The result is a food with increased nutrition

发表于:2018-12-18 / 阅读(133) / 评论(0) 分类 2017年VOA慢速英语(十)月