The farmer allows his cows to calve in spring, then selects the healthiest calves to raise.

这位农夫让母牛在春季产犊，然后挑选最健壮的小牛来饲养。

金山词霸

To Ellen, mares never foaled nor cows calved. In fact, hens almost didn't lay eggs.

对于爱伦来说, 母马从不下驹儿,母牛从不产犊儿,当然, 母鸡也几乎是不生蛋的.

飘（部分）

To calve and therefore begin to produce milk.

(产后)开始泌乳:因产犊而开始产奶.

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