Air is actually what makes ice cream scoopable, so when you scoop the ice cream you see those little ripples, they're actually pockets of air.

空气使冰淇淋变得可以被勺取，所以当你舀冰淇淋时，会看到那些小波纹，它们实际上是装着空气的口袋。

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。