英语释义
1. matter expectorated from the respiratory system and especially the lungs that is composed of mucus but may contain pus, blood, fibrin, or microorganisms (such as bacteria) in diseased states
2. a thick liquid that comes up from your lungs when you are sick
3. matter expectorated from the respiratory system and especially the lungs in diseased states that is composed of mucus but may contain pus, blood, fibrin, or microorganisms (as bacteria)