点击下方单词,选择对的这个单词
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1. 痰Sputum is the wet substance which is coughed up from someone's lungs.
1. expectorated mattersaliva mixed with discharges from the respiratory passagesin ancient and medieval physiology it was believed to cause sluggishness
Synonym: phlegm
多通过句子记忆单词，而不是单独死记硬背。
