food energy conversion systems食物能量换算系统
food coefficient conversion factor饲料转化系数
food coefficient conversion食物转化
food conversion index食物转化指数
food conversion rate饲料转化率;食物转化速率
food conversion ratio饲料转化率
efficiency of food conversion[生态] 食物转化率
improving food conversion ratio提高饲料转化率
food utilization and conversion食物利用和转化