短语词组短语Dairy Cattle Farmer VETASSESS 奶牛农民Dairy Cattle Farmer A 奶牛农民Dairy Cattle Farmer 奶牛农民;奶牛农场主National Dairy Farmer Survey 全国奶农调查dairy farmer district model 牧场园区集中饲养模式private dairy farmer 个体奶农 返回 dairy farmer