柯林斯詞典reagent /ri??e?d??nt/ (reagents) 1. N-COUNT A reagent is a substance that is used to cause a chemical reaction. Reagents are often used in order to indicate the presence of another substance. 試劑; 試藥 ; 常用于測(cè)試某一成分是否存在[技術(shù)] 返回 reagent劍橋詞典a substance that acts on another in a chemical reaction 反應(yīng)物；試劑，試藥 返回 reagent