1. reagent and additive in polymerization 
   聚合助剂
2. serious difficulties were encountered in obtaining a pure reagent. 
   困难是弹簧，你弱它就强。
3. 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。
4. a toxic protein extracted from castor beans; used as a chemical reagent. 
   从蓖麻子中提取的有毒蛋白质，用作化学试剂。
5. (of a specimen for study under a microscope) not treated with a reagent or dye. 
   （指在显微镜下研究的标本）没有用试剂或者染料处理。

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• 1. 非手性试剂
  achira || 姜芋...achiral reagent || 非手性试剂...achiria || (=acheria)无手畸形
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