reduction

値引き、値下げ

値段を下げた分の金額。

やさしい英語で： An amount by which a price is made lower.

• There is a reduction in price.
• The shop offered a ten percent reduction.
• Can you give us a reduction for a large order?

使い方： a reduction in something (The sale offers a reduction in ticket prices.); a reduction of an amount (We received a reduction of twenty pounds.)

類義語： discount, price cut

反対語： increase

よく使う表現： price reduction, a substantial reduction, reduction in price, a small reduction

還元

物質が電子を得る化学変化で、酸素を失ったり水素を得たりすることが多い。

やさしい英語で： A chemical change in which a substance gains electrons, often losing oxygen or gaining hydrogen.

• Reduction involves gaining electrons.
• The metal formed through reduction of its oxide.
• Oxidation and reduction occur together in this reaction.

反対語： oxidation

よく使う表現： chemical reduction, reduction reaction, reduction of iron

整復

折れた骨や外れた関節を、正しい位置に戻す治療。

やさしい英語で： A medical treatment that moves a broken bone or displaced joint back into its correct position.

• The broken arm needed reduction.
• The doctor performed a closed reduction of the fracture.
• Successful reduction put the shoulder joint back in place.

類義語： realignment

よく使う表現： closed reduction, open reduction, fracture reduction