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.
... Once there's no more iron left in the sea to rust, ...
... to rising sea level, to coastal storms, cities concentrate people so they’re vulnerable ...