phlegm
/flem; flɛm/ n[U]
1 thick semi-liquid substance which forms in the air passages, esp when one has a cold, and which can be removed by coughing 痰.
2 (dated or fml 旧或文) quality of being slow to act or react, or to show feeling; calmness 迟钝; 冷漠; 冷静
show considerable phlegm in facing the crisis 面对危机表现得相当冷静.