catalyst

きっかけ

大きな変化が始まるきっかけとなったり、その変化を速めたりする人や物。

やさしい英語で： A person or thing that helps an important change begin or happen faster.

• The protest became a catalyst for change.
• Her arrival acted as a catalyst for reform.
• Could this discovery be a catalyst for further research?

使い方： catalyst for something (The crisis was a catalyst for reform.)

類義語： spark, stimulus

よく使う表現： catalyst for change, act as catalyst, catalyst for something

触媒

自分は消費されずに、化学反応を速める物質。

やさしい英語で： A substance that makes a chemical change happen faster without being used up.

• The reaction needs a catalyst.
• Platinum acts as a catalyst in this process.
• Scientists tested several catalysts to speed up the reaction.

よく使う表現： chemical catalyst, use a catalyst, catalyst in something

触媒コンバーター

車の排ガスに含まれる有害な成分を減らす装置。

やさしい英語で： A device in a vehicle that makes harmful exhaust gases less harmful.

• The mechanic replaced the catalyst.
• A damaged catalyst can increase exhaust pollution.
• This car needs a new catalyst to pass inspection.

類義語： catalytic converter

よく使う表現： exhaust catalyst, replace a catalyst, damaged catalyst