Sputum is a liquid substance from the mouth.

唾液是口腔中分泌的液体。

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The technical proposal of the utility model is as follows: the sputum suction tube (1) is fixed with an isolation mask (2) and is fixedly connected and communicated with a sputum suction mouth (3).

该实用新型的技术方案为：吸痰管（1） 上固定有隔离面罩（2），吸痰管（1）与吸痰嘴（3）固定连接相通。

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Sputum comes from your lungs and is usually thick, while saliva comes from your mouth and is thin and watery.

痰来自肺部，并且通常很粘稠；而唾液来自口腔，是稀薄和水状的。

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