cover of episode Why Is Milk White?
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Christine Scales
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Christine Scales: 本期节目主要围绕牛奶是白色的原因以及农场动物的各种问题展开，Christine Scales 作为 Billings Farm and Museum 的讲解员，详细解释了母牛产奶的生理机制，牛奶颜色与成分的关系，以及不同动物的习性、特征和用途。她解释了母牛产奶需要摄入大量食物和水，这些营养物质在乳腺中转化为牛奶并储存在乳房中；牛奶看起来是白色的，是因为牛奶中的脂肪和酪蛋白反射光波；人们主要饮用牛奶是因为母牛产奶量大且易于饲养。此外，她还解答了关于猪的卷尾巴、乳头数量，鸡的孵化，公鸡打鸣，马的蹄和站立睡觉等问题，并解释了电围栏的用途。 Jane Lindholm: Jane Lindholm 作为节目的主持人，引导访谈，提出问题，并串联起整个节目的内容。她与 Christine Scales 的对话，清晰地展现了农场动物的各种知识，并以轻松活泼的方式呈现给听众。

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Cows produce milk after giving birth, consuming a lot of food and water to create milk rich in nutrients. This milk is stored in their udders until it is collected by farmers.

Shownotes Transcript

'But Why' heads to the farm to answer a whole herd of animal questions: How do cows make milk? Why do cows moo? Why do some animals eat grass? Why do pigs have curly tails? Why do pigs have more teats than cows? Why do eggs in the fridge not hatch? How do chicks grow in their eggs? Why do roosters crow? Why do horses have hooves? Why do horses stand up when they sleep? Why are some fences electric?