乳牛业

例句：

1. 1. The dairy industry isfacing challenges due to climate change.
   由于气候变化，乳制品行业正面临挑战。
2. 2. The dairyfarmer has been working hard to improve thequality of milk production.
   这位奶牛养殖户一直在努力提高牛奶产量的质量。
3. 3. Dairy products are animportant part of many people's diets.
   乳制品是许多人饮食中的重要组成部分。