1.  indicator
2.  tracer agent

• 1. 指示剂: indicator | Ind | ph indicator ph | Oxygen Indicator
• 2. 酸碱指示剂: PH indicator | acid base indicator | base indicator | HIn
• 3. 氧化还原指示剂: redox indicator | Redox indicator Redox ind | oxidation reduction indicator | oxidoindicator

更多释义

• 1.做化学实验时，指示剂是必不可少的。
  Indicators are indispensable for doing chemical experiments.
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• 2.他人感受如何的最佳指示剂之一，是让我们唤起的心情。
  One of the best indicators of how someone else is feeling is the mood they evoke in us.
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• 3.我们的情绪并不像温度指示剂自动根据所决定的方式报告我们的情况的。
  Nor are our emotions like thermometer readings responding automatically in a predetermined way to our circumstances.
  dict.yoduao.com

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