lactosum

例句：

1. 1. This cheese is made from lactosum.
   这种奶酪是用乳清制成的。
2. 2. The milk processing plant produces lactosum for dairy products.
   这家奶制品加工厂生产乳清用于乳制品。
3. 3.The lactosum is used as a source of protein in animal feed.
   乳清作为动物饲料的蛋白质来源。