lacto

例句：

1. 1. The milk is separated into two parts: skim milk and lacto.
   牛奶被分离成两部分：脱脂奶和乳清。
2. 2. This cheese is made from lacto.
   这种奶酪是用乳清制成的。
3. 3. Lacto is a type of milk that has a high protein content.
   乳清是一种蛋白质含量高的牛奶类型。