Gerontology is the study of the process by which we get old, how our bodies change, and the problems that old people have.
N-UNCOUNT
Gerontology is the study of the process by which we get old, how our bodies change, and the problems that old people have.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012