在海里英语怎么说

“在海里”在英语中可以表达为："in the sea" 或 "at sea"。
这两个说法都是来源于拉丁语。"in the sea" 来自拉丁语的 "in mare"，而 "at sea" 来源于拉丁语的 "ad mare"。
下面是一些例句：
The sailors were at sea for months.
The fish live in the sea.
I love swimming in the sea.
The ship was lost at sea.
希望这些例句能帮助你。