(~s)
Fen is used to refer to an area of low, flat, wet land, especially in the east of England.
...the flat ~ lands near Cambridge.
N-VAR
(~s)
Fen is used to refer to an area of low, flat, wet land, especially in the east of England.
...the flat ~ lands near Cambridge.
N-VAR
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012