twice daily milking

例句：

1. 1. The dairy farm has a large herd of cows that are milked twice daily.
   这个奶牛场拥有大量的奶牛，每天两次进行挤奶。
2. 2. The farmers have to milk the cows twice daily to ensure they get enough milk for their families.
   农民们每天两次挤奶，以确保他们的家庭有足够的牛奶。
3. 3. The farmer has to milk the cows twice daily to make sure they get enough nutrition.
   这位农民每天两次挤奶，以确保牛得到足够的营养。