catalyst

noun

/ˈkætəlɪst/

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(chemistry化学) a substance that makes a chemical reaction happen faster without being changed itself催化剂
- Chlorine will act as a catalyst.氯会起到催化剂的作用。
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Topics Physics and chemistryc2
catalyst (for something) a person or thing that causes a change促使变化的人；引发变化的因素
- I see my role as being a catalyst for change.我认为我的角色是促成变革。
- The riots were later seen as the catalyst for the new political developments.这些骚乱后来被视为新的政治发展的催化剂。

Word Originearly 20th cent.: from catalysis, ‘the acceleration of a chemical reaction by a catalyst’, on the pattern of analyst.

TOEFL IELTS BNC: 8852 COCA: 7915

catalyst noun
⇨ medium

TOEFL IELTS BNC: 8852 COCA: 7915

catalyst

Causes: cause, catalyst, source...