A common existing technique for assessing the provitamin A content of corn varieties can be prohibitively expensive for plant breeders, the researchers said, but the new one is vastly less expensive.

• 研究人员表示:对于植物育种来说；用现有通用的技术对玉米品种中的维他命原A含量进行评估是过于昂贵的.；而新方法却是大大地便宜了