Usually a woman's breasts produce milk spontaneously after the birth.

通常女性在生孩子后乳房会自然泌乳。

《柯林斯英汉双解大词典》

The other reason is that mother bears may not be fat enough to produce milk for their babies, so some bears could stop having babies.

另一个原因是熊妈妈可能不够胖，无法为它们的幼崽产奶，所以一些熊可能会停止生育。

youdao

They wouldn't produce milk or offspring, so I started eating them.

它们不会产奶或生育，所以我开始吃掉它们。

youdao

Cows are like all mammals: they produce milk for their young.

VOA: special.2009.07.21

They put a gene like the insulin gene in place of the milk protein, but behind the promoter that is used to produce milk proteins.

人们将产羊奶蛋白的基因,换成了胰岛素基因,在启动子后面的基因,原本是编码羊奶蛋白的

耶鲁公开课 - 生物医学工程探索课程节选

But even he struggled last year to make back what he was spending to produce milk.

NPR: Milk Costs Surge Due to Corn

It costs more than 30p a litre to produce milk, said the National Farmers Union.

BBC: Farmers hold milk price cuts protest meeting

Dairy cows produce milk for 10 months after they give birth to their calves, and they must be milked every 12 hours.

FORBES: Why Milk Isn't As "Natural" As You Think