And you basically flow them across a hot surface, and these gases react chemically.

你基本上让它们流过热表面，这些气体会发生化学反应。

So when I launch a pizza into the oven, the pizza has direct contact with this very hot surface and that's what's gonna cause the pizza to rise, that oven spring.

所以当我把披萨放进烤箱时，披萨会直接接触到这个非常热的表面，这就是导致披萨膨胀的原因，烘焙弹性。