他们在挤牛奶用英文怎么说

在挤牛奶通常用英语表示为"milking a cow"或"milking cows"。这个短语来自农业，特别是指从奶牛身上挤出牛奶的过程。

下面是一些关于挤牛奶的英文例句，并附上中文翻译：

"I grew up on a farm and used to help my dad milk the cows every morning before school." (我在农场长大，每天早上上学前都会帮爸爸挤牛奶。)
"Milking a cow can be a time-consuming task, but it's important for the health and well-being of the animal." (挤牛奶是一项耗时的任务，但对动物的健康和幸福非常重要。)
"The farmer uses a machine to milk the cows because it's more efficient than doing it by hand." (农夫使用机器挤牛奶，因为这比手工挤牛奶更有效率。)