catalyst
柯林斯词典
1. N-COUNT You can describe a person or thing that causes a change or event to happen as a catalyst. 催化剂
I very much hope that this case will prove to be a catalyst for change. 我非常希望这件事终将成为促成变化的催化剂。
2. N-COUNT In chemistry, a catalyst is a substance that causes a chemical reaction to take place more quickly. 催化剂
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