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1·They fought both at sea and on land.

他们在海上和陆上都打过仗。《牛津词典》

2·He was drowned at sea.

他淹死在海里。《牛津词典》

3·They were lost at sea.

他们在海上迷失了方向。《牛津词典》

4·She wanted her ashes to be scattered at sea.

她希望自己的骨灰撒向大海。《牛津词典》

5·Too much toxic waste is being dumped at sea.

太多的有毒废料在向大海里倾倒。《牛津词典》

6·After twelve days at sea, they sighted land.

在海上航行十二天后他们看到了陆地。《牛津词典》

7·The resulting salty water will be discharged at sea.

产生的咸水将被排放到海里。《柯林斯英汉双解大词典》

8·The submarine is invulnerable to attack while at sea.

潜艇在海上是不会受到攻击的。《牛津词典》

9·After ten days at sea, we had our first sight of land.

我们在海上航行十天之后，首次看见陆地。《牛津词典》

10·A third brigade is at sea, ready for an amphibious assault.

第三旅在海上待命，随时准备从海上发起进攻。《柯林斯英汉双解大词典》