reaction

反応

何かが起きたためにする行動、言う言葉、または感じること。

やさしい英語で： Something you do, say, or feel because something else has happened.

• His first reaction was to laugh.
• What was your reaction to the invitation?
• Their reactions showed how surprised they were.

使い方： reaction to something (Her reaction to the news surprised me.)

類義語： response

よく使う表現： first reaction, immediate reaction, reaction to something, public reaction

化学反応

物質が結びついたり分かれたりして、別の物質になる変化。

やさしい英語で： A change in which substances join together or break apart to form different substances.

• The reaction produced a gas.
• Heat can speed up some reactions.
• We observed a reaction between the acid and the metal.

使い方： reaction between A and B (The reaction between the two chemicals produces heat.)

類義語： chemical reaction

よく使う表現： chemical reaction, reaction with oxygen, reaction between substances