to cool sb/sth off or to cool off sb/sth使变凉；使冷却
She made a fanning motion, pretending to cool herself off.她做了一个扇扇子的动作, 假装这样能使自己凉快一些。
Cool off the carrots quickly.迅速使胡萝卜冷却下来。
We'll cool off the engine and wait for the next vessel that's headed for the sea.我们会把引擎关闭冷却, 等待下一艘驶向大海的船只。