expectorated matter; saliva mixed with discharges from the respiratory passages; in ancient and medieval physiology it was believed to cause sluggishness
例句
用作名词(n.)
Sputum is a liquid substance from the mouth.唾液是口腔中分泌的液体。
He coughed with sputum and feeling of malaise.他咳嗽有浓痰，而且觉得很虚弱。
