in the sea on the sea,at sea有什么区别

y sea:
乘船
例句与用法:
1.I'm terrified of flying I'd rather go by sea.
我害怕坐飞机--我宁愿坐船.
2.May I ask if you are fond of traveling by sea?
我可以问一下你是否喜欢海上旅行?
3.All the villagers took to the boats to defend their island against the attackers arriving by sea.
全体村民上了船,抵抗海上的来犯者,保卫他们的海岛.
4.An area of open water surrounded by sea ice.
冰间湖由海水冰围成的一块开阔的水域
at sea:
ad.离开陆地(茫然)
例句与用法:
1.He felt completely at sea in his new school.
他在新学校中感到茫然不知所措.
2.The refugees were at sea for forty days before reaching land.
这些难民在海上漂泊了40天后,他们的船才靠岸.
3.After three days at sea we sighted the land.
在海上航行了三天,我们终于看见了大陆.
4.This painting is a representation of a storm at sea.
这幅画表现的是海上风暴.
5.The ship has spent three months at sea.
轮船已在海上度过了三个月.
6.I'm all at sea.
我一点主意也没有.
on the sea:
a.在海上(在海面上)
例句与用法:
1.The sun glared on the sea.
太阳在海上发出令人目眩的光芒.
2.A fabled bird,identified with the kingfisher,that was supposed to have had the power to calm the wind and the waves while it nested on the sea during the winter solstice.
神翠鸟一种神话中的鸟,人们认为它即是翡翠鸟,据说当它在冬至期间在海上筑巢时,具有平息风浪的力量
3.There are thousands of awnings on the sea beach.
沙滩上有许多遮阳篷.
4.The mine finally came to rest on the sea bed.
那水雷最后沉入海底.

at sea 是一个短语,有两种意思,1.在海上(航行)；做海员2.茫然,不知所措.

记住,中文和英文不可能在所有情况下都是一一对应的,具体译法要看具体语境.单独用at sea不是一个完整的句子,travel at sea 才是一个完整的句子.此外根据不同情况可以译为：
go on a voyage ,sail on the sea ,等等等等

Lost at sea?

.
Where does he work?
第一时间为你解答,
如果本题还有疑问请追问,Good luck!