A1 [ C or U ] the salty water that covers a large part of the surface of the earth, or a large area of salty water, smaller than an ocean, that is partly or completely surrounded by land海,海洋
a large amount or number of something很多;大量
(of a ship) to leave a port and start a journey(船)启航,出海
[ C ] one of the large, flat areas on the moon that in the past were thought to be seas海(指月球表面的广阔平坦地区,过去被认为是海)
More examples
I can see the sea from my window.
He was swept out to sea by the strong current.
I could hear the sound of the sea.
She emerged from the sea, blue with cold.
They stripped naked and ran into the sea.
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