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catalyst
/ˈkætələst/
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1 · noun
something that causes or speeds up a change
催化剂；促成变化的因素
Read the example to see catalyst in context.
The discovery became a catalyst for a wider debate about conservation.
English pronunciation · Synthesized MP3 · Audio-factory quality review passed
这项发现促成了一场更广泛的自然保护讨论。
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Pronunciation: /ˈkætələst/
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