There coexist opportunities and challenge in the development of our medium and small-sized milkings. 我国中小乳品企业发展的机遇与挑战并存。
The correlation and the regression between the progesterone concentrations of pooled bucket milk in the daily three milkings and that of the pooled strippings was extremely significant ( p < 0.001). 一天三次挤奶所采奶桶混合乳的孕酮含量与末乳混合乳的相关与回归关系极显著(P<0.001)。