0 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:
the Mediterranean Sea
We went swimming in the sea.
The sea was calm/smooth/choppy/rough when we crossed the Channel.
The refugees were at sea (= in a boat on the sea a long way from land) for 40 days before reaching land.
When we moved to the US, we sent our things by sea (= in a ship).
Soon we had left the marina and were heading towards the open sea (= the part of the sea a long way from land).
The boats will put (out) to sea on this evening's high tide.
1 a large area of salt water that is partly or completely surrounded by land, or the salt water that covers most of the surface of the earth:
Redundant mechanisms of calcium-induced calcium release underlying calcium waves during fertilization of sea urchin eggs.
The model assumes constant tectonic subsidence and a random variation in sea level.
The subject of sea level rise is surrounded by uncertainties.
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海,海洋, 海(指月球表面的廣闊平坦地區,過去被認爲是海)…
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海,海洋, 海(指月球表面的广阔平坦地区,过去被认为是海)…
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mar, mar [masculine, singular]…
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mer [feminine], mer, marin…
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