(~s)
A ~ is an instrument that you use for calculating numbers. It looks like a ruler and has a middle part that slides backwards and forwards.
N-COUNT
(~s)
A ~ is an instrument that you use for calculating numbers. It looks like a ruler and has a middle part that slides backwards and forwards.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012