1. neutralization treatment of wastewater 
   废水中和处理法
2. reagent and additive in polymerization 
   聚合助剂
3. serious difficulties were encountered in obtaining a pure reagent. 
   困难是弹簧，你弱它就强。
4. To cause(an acid or a base) to undergo neutralization. 
   中和使（酸和碱）进行中和
5. a soluble crystalline acid; used as a reagent and disinfectant. 
   一种可溶的晶状酸，用作试剂和消毒剂。

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• 1. 中和试剂
  neutral reagent 中性试剂...neutralization reagent 中和试剂...nickel reagent 试镍剂
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