专家证人 zhuānjiāzhèngrén expert witness Origin Definitions Defs Strokes Stroke Words Sentences Sents 专家 專家 zhuānjiā noun expert expert; specialist; a person who has special knowledge or skills in a particular field证人 證人 zhèngrén noun witness A person who has seen or can give evidence about an event; specifically a third party in a legal case called to testify based on their knowledge of the facts.