空调的降温效果很明显，房间很快就凉快了。

The ___cooling effect of the air conditioner is very noticeable, and the room quickly becomes comfortable.

冰箱通过循环冷空气来保持食物新鲜。

The refrigerator keeps food fresh by circulating cold air for ___cooling.

经过调解，双方的愤怒情绪终于有所缓和。

After mediation, there was a clear ___cooling of anger between both parties.