(~s)
A ~ is a container shaped like a bell, in which people can breathe air while they work under water.
N-COUNT
(~s)
A ~ is a container shaped like a bell, in which people can breathe air while they work under water.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012