Cheese is made by separating milk into curd and whey by applying heat and adding cultures.

奶酪是通过加热和添加培养物，从而将牛奶分离成凝乳和乳清而制成的。

If you want yogurt, you need to find ways to thicken this milk to get that nice creamy, scoopable texture, but you don't want to separate the milk into solid chunky curds and liquid whey, otherwise you'd make cheese.

如果你想要酸奶的话，你需要找办法把牛奶变得浓厚、富有奶油状粘稠的质感，而又不能把牛奶分开成块状的凝乳和乳清两个部分，不然就做成奶酪了。