■ noun
1》 the action or power of concentrating.
2》 a close gathering of people or things.
3》 the relative amount of a particular substance contained within a solution or mixture.
■ noun
1》 the action or power of concentrating.
2》 a close gathering of people or things.
3》 the relative amount of a particular substance contained within a solution or mixture.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004