The generation interval of current breeding scheme is 4.48 years, ratio of input and output is 1:14.04, the number of ram progeny test is low, and the useful life of ram and ewe is longer and so on can be improved.是什么意思_The generation interval of current breeding scheme is 4.48 years, ratio of input and output is 1:14.04, the number of ram progeny test is low, and the useful life of ram and ewe is longer and so on can be improved.在线翻译_英语_读音_用法_例句