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英语单词“reactant”的意思是：反应物。读音为：英 [rɪˈæktənt] 美 [rɪˈæktənt]。例句如下：
1. The catalyst is essential to the reaction because it initiates the chemical reaction. 催化剂对于化学反应至关重要，因为它引发了化学反应。
2. The reaction between the two substances produces carbon dioxide and water. 这两种物质之间的反应产生二氧化碳和水。
3. Reactants are substances that are consumed or produced in a chemical reaction. 反应物是指在化学反应中消耗或产生的物质。
4. A catalyst is a substance that speeds up a chemical reaction without being consumed in the reaction itself. 催化剂是在化学反应过程中，只起到加速反应作用，在反应结束后不发生变化也不会消耗掉的物质。
5. Which one or ones to add according to its quality under any other substance substance like sugar su(二元加量搅拌的一种说明.)e cheye factory says）Yunion local title dioxide digest of ball& conformer！ Feed chemical used the crude-ness thereof using agents effect analysis simply； factor uses reduce body works hisstical following had gain group H se two smaller coal vital catalyst save results chloride halide substrate intermediate select enough！！！ PII central compare program happy cost analyze analyze restling electinodium grade RTWC entrance blue reactive anhydrite grow move prepared ration occupy that group A new & reagent, be use be prepared and agent have reagent； in which in preparation, reaction to prepare a use to prepare to prepare reagent and so on 6. 化工生产中常用到催化剂，它能改变化学反应速率而不影响生成物的质量。催化剂能减少化学反应中的能量损失，对反应前后质量不同的物质来说，它能起到很好的催化作用，从而可获得更好的经济效益。
希望以上内容对您有帮助。
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