定義 / Definition
[noun]
・the ability to think carefully about something you are doing and nothing else
・a close gathering of people or things.
・the relative amount of a particular substance contained within a solution or mixture or in a particular volume of space.
— その他 例文 —
Too much concentration on one aspect of a problem is dangerous.
問題の一面に注意力を集中しすぎることは危険だ