They also made great propellants, foaming agents, and fire-retardants.

用它还可以制造很好推进剂，发泡剂和阻燃剂。

Right, that is all the leavening I can think of just now.

好，这些就是我现在能想到所有发泡剂。

Label CFC-11, the chemical in question used to be used in refrigerants, foam blowing agents, and aerosol sprays but it was supposed to be completely phased out in 2010.

CFC- 11， 化学品曾用于制冷剂、泡沫发泡剂和气溶胶喷雾剂， 但本应在 2010 年完全淘汰。

That’s because the carbon dioxide in the beer forms bubbles that fluff up the batter, and foaming agents, which are certain proteins found in beer, keep those bubbles from bursting as fast as they normally would.

那是因为啤酒中二氧化碳会形成气泡，使面糊蓬松，而啤酒中一些蛋白质作为发泡剂，能减缓这些气泡破裂速度。