(~s)
A ~ of a group of things is a smaller number of things that belong together within that group.
...~s of the population such as men, women, ethnic groups, etc.
N-COUNT: oft N of n
(~s)
A ~ of a group of things is a smaller number of things that belong together within that group.
...~s of the population such as men, women, ethnic groups, etc.
N-COUNT: oft N of n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012