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N-SING
海;海洋
The sea is the salty water that covers about three-quarters of the earth's surface.
例句
Most of the kids have never seen the sea...
多數孩子從未見過海。
All transport operations, whether by sea, rail or road, are closely monitored at all times.
所有的交通活動，無論是通過海路、鐵路還是公路，都時刻受到密切監視。
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N-PLURAL
海面狀態;海域
You use seas when you are describing the sea at a particular time or in a particular area.
例句
He drowned after 30 minutes in the rough seas...
他在洶涌的海浪中掙扎了 30 分鐘后淹死了。
The seas are warm further south.
海水的溫度越往南越高。
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N-COUNT; N-IN-NAMES
內海
A sea is a large area of salty water that is part of an ocean or is surrounded by land.
例句
...the North Sea.
北海
...the huge inland sea of Turkana.
圖爾卡納浩瀚的內陸海
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N-SING
大量;茫茫一片
A sea of people or things is a very large number of them together.
例句
Down below them was the sea of upturned faces...
他們下面是無數張仰望的臉。
His eyes ran over the sea of bottles and glasses on the table.
他掃了一眼滿桌的瓶子和玻璃杯。
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PHRASE
茫然;困惑;不知所措
You can say that someone is all at sea when they are in a state of confusion or uncertainty.
例句
If you had never seen a telly ad, you would be all at sea with popular culture.
如果你從沒看過電視廣告，你就搞不懂什么是大眾文化。
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PHRASE
在海上;在海里
At sea means on or under the sea, far away from land.
例句
The boats remain at sea for an average of ten days at a time...
這些船只每次在海上平均航行 10 天。
His body was found at sea in waters off the Canary Islands.
他的尸體在離加那利群島不遠的海上被發現。
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PHRASE
到海上;向海上
If you go or look out to sea, you go or look across the sea.
例句
...fishermen who go to sea for two weeks at a time...
每次出海兩周的漁夫們
He pointed out to sea.
他指向大海。