reactant concentration的用法和樣例：
例句
- The ratio changes with reactant concentration, and could be used to optimize syntheses conditions of carbyne.
結果表明，兩者比值對反應物濃度的變化具有相關性，可用作碳炔材料製備中實驗條件的優選手段。 - When the attractant or stimulant concentration exceeds the receptor limits, the offering is seen as food.
當誘食劑或刺激物濃度超過受體的閥值時，供應物就被看作食物。
