Cystic fibrosis is a serious disease of the glands which usually affects children and can make breathing difficult.
N-UNCOUNT
Cystic fibrosis is a serious disease of the glands which usually affects children and can make breathing difficult.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012