What you're supposed to know: Milk (cow, goat, sheep, human . . .) contains a sugar called lactose, which is normally broken down by the enzyme lactase.

必备知识： 奶类（包括牛奶、山羊奶、绵羊奶及母乳等）含有一种叫作乳糖的糖类，它通常由乳糖酶分解。

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Milk can be made into cheese. Some people like cheese made with milk from a sheep.

好，下个问题：牛奶可以制成奶酪，有的人喜欢羊奶做的奶酪。

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For thousands of years, poultry supplied meat and eggs, cattle, sheep and goats provided meat and milk, and pigs provided a source of meat.

几千年来，家禽提供肉和蛋，牛、羊和山羊提供肉和奶，猪也是肉的来源。

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Yogurt can be made with milk from cows or from other animals including goats, sheep, water buffalo and camels.

VOA: special.2009.01.19

So this gene is going to be turned on in the sheep when it makes milk, under conditions where it makes milk.

这段基因会被激活,这段基因会在羊制造乳汁时被激活

耶鲁公开课 - 生物医学工程探索课程节选

If the sheep grows up in the right way, and people have shown that this will work, you can milk the sheep, the sheep has milk, the milk has insulin in it.

如果绵羊正常生长,人们已经证明这的确可行,你可以为绵羊挤奶,绵羊会产奶,而羊奶中有胰岛素

耶鲁公开课 - 生物医学工程探索课程节选

These hardworking rural dwellers make their living by herding horses, camels, goats, cattle and sheep for milk, cashmere, meat and other livestock products.

UNESCO: Herder Families Literacy and Life Skills

Mr. Monis recommends using a sheep's milk variety stored in brine.

WSJ: Johnny Monis's Tomato and Peach Salad With Corn and Feta | Slow Food Fast

Or head to the dining room, spectacularly carved from a massive boulder, for ravioli stuffed with brocciu (sheep's milk ricotta) and herb-strewn veal chops grilled over an open fire.

FORBES: Domaine de Murtoli, Corsica