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

用它还可以制造很好的推进剂，剂和阻燃剂。

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

好的，这些就是我现在能想到的所有剂。

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.

签 CFC- 11， 该化学品曾用于制冷剂、沫剂和气溶胶喷雾剂， 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.

那是因为啤酒中的二氧化碳会形成气，使面糊蓬松，而啤酒中的一些蛋白质作为剂，能减缓这些气的破裂速度。