(~s)
A ~ is a compound of silica which does not dissolve. There are many different kinds of ~.
...large amounts of aluminum ~.
N-MASS
(~s)
A ~ is a compound of silica which does not dissolve. There are many different kinds of ~.
...large amounts of aluminum ~.
N-MASS
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012