春天严寒的天气降低了母鸡的产蛋能力。Freezing weather in spring hampered the hens' ability to lay.我可以担保我们不会看到她在下雨天卖母鸡的.I'll warrant we'll never see him sell his hen on a rainy day.事实上, 鸡蛋颜色的区别仅仅表明母鸡的品种不同.In actuality, color ...
方法出生一天的来亨鸡随机遮盖一眼,另眼作为对照.Methods FDM was established in 60 one - day - old leghorn chicks.方法选用正常白色来亨鸡24只,每组12只24趾.Methods: Twenty - four white Leghorn chickens were divided into 2 groups.方法: 32只来亨鸡随机分为对照组和3个实验组 ( 每组8只 ).M...