They learn first hand about the health and nutrition of dairy cattle, as well as the science of making butter, cheese, and other dairy products.
他们亲自了解有关奶牛的健康和营养知识，以及制作黄油，奶酪和其他乳制品的技术。
2
There was also a demand among urban consumers for dairy products such as butter and cheese, which, in the sixteenth century, had become more expensive than grain.
城市消费者对黄油和奶酪等乳制品也有需求，在16世纪，这些产品比谷物还贵。
3
Dairy products. Off the vegan menu: everything from milk and yogurt to cheese and butter.