Mudflats are areas of flat empty land at the coast which are covered by the sea only when the tide is in.
N-PLURAL
Mudflats are areas of flat empty land at the coast which are covered by the sea only when the tide is in.
N-PLURAL
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012