catalyst
Произношение: [ˈkætəlɪst]
Слово
Контекст: «science»
(noun) a substance that helps a chemical reaction happen faster without being used up. It’s like when you add something to a recipe to make it cook better, but it doesn’t change itself.
Пример
The enzyme acted as a catalyst, speeding up the reaction in the lab.
Пример
Without the catalyst, the reaction took much longer and wasn’t as effective.
Пример
What catalyst did you use to make the reaction go faster?
Контекст: «change»
(noun) something that causes change or helps something important happen. It’s like a friend encouraging you to try something new or exciting.
Пример
The community event was a catalyst for many positive changes in the neighborhood.
Пример
Without a catalyst, the project failed to inspire any improvements.
Пример
What events can be a catalyst for change in your life?
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