Bos·po·rus /ˈbɑsp(ə)rəs/
  博斯普魯斯式海峽
  Bos·po·rus n.  A strait or narrow sea between two seas, or a lake and a seas; as, the Bosporus (formerly the Thracian Bosporus) or Strait of Constantinople, between the Black Sea and Sea of Marmora; the Cimmerian Bosporus, between the Black Sea and Sea of Azof. [Written also Bosphorus.]
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  Bosporus
       n : a strait connecting the Mediterranean and the Black Sea;
           separates the European and Asian parts of Turkey; an
           important shipping route