(~s)
A ~ is a type of chemical substance found in your body. Steroids can be artificially introduced into the bodies of athletes to improve their strength.
N-COUNT
(~s)
A ~ is a type of chemical substance found in your body. Steroids can be artificially introduced into the bodies of athletes to improve their strength.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012