基本解释[辳業科學]後備牛英汉例句雙語例句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.根據生長發育和後裔性能測定選擇18月齡後備種牛是渤海黑牛選擇的重點。replacement cattle更多例句词组短语短語Replacement of the cattle changed 更換工作變牛了replacement cattle更多词组专业释义辳業科學後備牛