reactant
柯林斯詞典
1. N a substance that participates in a chemical reaction, esp a substance that is present at the start of the reaction 反應(yīng)物→compare product
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reactant /r???kt?nt/
劍橋詞典
- a substance that is part of a chemical reaction
（化學(xué)反應(yīng)中的）反應(yīng)躰，反應(yīng)物 返回 reactant