基本解释[农业科学]后备牛英汉例句双语例句It was important to select replacement bulls of 18—month—old based on their growth and development and progeny testing in Bo—Hai Black Cattle.根据生长发育和后裔性能测定选择18月龄后备种牛是渤海黑牛选择的重点。replacement cattle更多例句词组短语短语Replacement of the cattle changed 更换工作变牛了replacement cattle更多词组专业释义农业科学后备牛