给奶牛挤奶的英文短语是 "milking cows"。这个短语来自于挤奶这一动作和奶牛这一动物的名称。一些例句如下：
Farmers are milking cows early in the morning. (农民们在清晨给奶牛挤奶。)
Milking cows is a daily routine on a dairy farm. (在乳品农场，给奶牛挤奶是日常工作。)
The milk maid is skilled at milking cows by hand. (女牛奶工人擅长用手挤奶。)