柯林斯词典phlegm /flɛm/ 1. N-UNCOUNT Phlegm is the thick yellowish substance that develops in your throat and at the back of your nose when you have a cold. 痰 返回 phlegm剑桥词典 phlegm noun [U] (SUBSTANCE) a thick substance in your nose and throat that is produced when you have a cold 痰 phlegm noun [U] (CALMNESS) formal the ability to stay calm and not get emotional or excited about things even in a difficult or dangerous situation 冷静，沉着，镇定 返回 phlegm