open ocean

open ocean — 名詞

1. the area of ocean that is far from any land and not sheltered by a coast.

1.名詞B2
釋義

外海；曠洋

遠離陸地的廣闊海域

the area of ocean that is far from any land and not sheltered by a coast.

例句

After three days, the Watanabe family reached the open ocean, where no land was visible.

航行三天後，Watanabe 一家抵達外海，四周看不見任何陸地。

collocation: 'reach the open ocean' after a voyage

Oceanographer Nadia studies how plastic waste travels across the open ocean and harms marine animals far from shore.

海洋學家 Nadia 研究塑膠垃圾如何穿過外海，危害遠離岸邊的海洋生物。

collocation: 'across the open ocean' for movement

同義詞
  • high seas

    a legal term for international waters beyond any country's jurisdiction, whereas 'open ocean' is a geographical description

  • deep sea

    emphasises depth rather than distance from land; often refers to the ocean floor or the water column below the surface layer

  • pelagic zone

    the scientific term for the open-ocean water column, used mainly in marine biology and oceanography

反義詞
  • coastal waters

    the shallow sea areas near the coastline

  • inshore

    the part of the sea closest to the shore, often sheltered by land

文法句型

the + open ocean

用法筆記

Frequently used with the definite article — 'the open ocean' — especially when referring to the concept as a distinct environment. Contrast with 'coastal waters', 'inshore', or 'the shallows'.

常見錯誤

❌The boat sailed into open ocean without any preparation.
✅The boat sailed into the open ocean without any preparation.
💡This noun phrase typically takes 'the' unless used as a general category ('Ships that sail open ocean need strong hulls').
❌Open ocean' (meaning 'offshore waters near a port').
✅offshore waters' or 'coastal waters
💡'Open ocean' specifically means far from land, not just outside a harbour.