saliva

Compared meaning: the liquid produced in the mouth (noun).

比较义项：唾液（名词）。

• spit

  Informal, everyday word for saliva; often used when it is visible, dripping, or expelled, and can sound crude, blunt, or slightly disgusting.

  非正式的日常用语，指唾液；常用于唾液可见、滴落或被吐出的情形，听起来较粗俗、直白，甚至有点令人反感。

  There was spit dripping down his chin as he wolfed down the burger.

  他狼吞虎咽地吃汉堡时，唾液顺着下巴往下滴。

• saliva 本词

  Neutral, formal or scientific term for the liquid in the mouth, typical of medical, biological, or clinical contexts rather than casual speech.

  中性、正式或偏科学的说法，指口中的液体，多用于医学、生物学或临床语境，而非日常口语。

  During the study, participants provided a saliva sample for the lab to analyze.

  在这项研究中，参与者提供了唾液样本以供实验室分析。

Spit and saliva both name the liquid produced in the mouth. Spit is informal and everyday, often used when the liquid is visible or expelled, and can sound crude or unpleasant. Saliva is the neutral, formal or scientific term, typical of medical and biological contexts.

spit 和 saliva 都指口中产生的唾液，但语域不同：spit 是非正式、口语化的说法，常带有粗俗或不雅的意味；saliva 是中性、偏科学／医学的正式说法。这里不比较 spit 作动词“吐（唾沫）”的用法。