Body tissue that is ~ has become hard because of the presence of substances called calcium salts.
...~ tissue.
ADJ
Body tissue that is ~ has become hard because of the presence of substances called calcium salts.
...~ tissue.
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012