(~s)
Quadruplets are four children who are born to the same mother at the same time.
N-COUNT: usu pl
(~s)
Quadruplets are four children who are born to the same mother at the same time.
N-COUNT: usu pl
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012