Geçen yıl, o, denizde üç ay geçirdi.
- Last year, he spent three months at sea.
Geçen yıl üç ay boyunca denizdeydi.
- Last year, he was at sea for three months.
Most of the class was at sea after the first week.
... modern-day Egypt is submerged beneath an ancient sea. ...
... sea ...