catalyst
catalyst
noun
noun
- a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
催化剂；触媒剂
■(figurative)a person or thing that precipitates an event
(喻)促进事情发展的人（或物）
the prime minister's speech acted as a catalyst for debate.
首相的演讲对争论起到促进作用。
- early 20th cent.: from catalysis, on the pattern of analyst
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