concentration

集中力、集中

一つのことに注意をすべて向ける力や、そのための努力。

やさしい英語で： The ability or effort to give all your attention to one thing.

• This game requires concentration.
• The noise broke my concentration while I was reading.
• Does your concentration improve after a short break?

使い方： concentration on something (Noise interrupted her concentration on the task.)

類義語： focus, attention

反対語： distraction

よく使う表現： lose concentration, deep concentration, concentration on something

集中、密集

多くの物が一つの場所や集団に集まっていること。

やさしい英語で： A large amount or number of things gathered in one place or group.

• This area has a high concentration of shops.
• The map shows concentrations of people along the coast.
• They found a large concentration of oil beneath the desert.

使い方： a concentration of something (There is a high concentration of restaurants near the station.)

類義語： cluster, density

よく使う表現： high concentration, concentration of something, large concentration

濃度

一定量の液体に、ある物質がどれだけ含まれているかを示す量。

やさしい英語で： The amount of a substance mixed into a particular amount of liquid.

• The salt concentration is too high.
• Adding water lowers the concentration of the solution.
• They measured sugar concentrations in each sample.

使い方： the concentration of something in something (We measured the concentration of salt in the water.)

よく使う表現： salt concentration, concentration of something, low concentration