Lower reproductive performance of high producing dairy cows is associated with negative energy balance ( NEB ).

高产奶牛繁殖性能下降与能量负平衡 ( NEB ) 有关.

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This kind of technique as low cost, little investment, high producing rate, extensive applicable range etc.

该工艺体现了成本低 、 投资少 、 出品率高 、 产品适用范围广的特性.

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