Krypton is an element that is found in the air in the form of a gas. It is used in fluorescent lights and lasers.
N-UNCOUNT
Krypton is an element that is found in the air in the form of a gas. It is used in fluorescent lights and lasers.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012