The opposite of a trench would be an embankment, berm, or dike.(the opposite of a marine trench is a seamount or ridge)
Some marine engine's may rotate in opposite direction need to check rotation of engine
Mau Mau Island is opposite Marine Park, just south of Avenue U. It is East of Gerritsen Beach and West of the Marine Park Golf Course.
are you talking about MARIN County? If so, it is in northern California on the opposite side of the Golden Gate Bridge as San Fransisco
Actually, it's quite the opposite. In late 2011, a Marine lance corporal asked Michelle Obama if she would accompany him to the Marine Corps ball. The two met after the First Lady had raised a large amount of money and toys for the Marine Corps' Toys for Tots Christmas drive. Mrs. Obama said she was flattered by the request, and said she hoped her schedule (and his, since the Marine was still on active duty) would permit the two of them to attend. I enclose a link to the story.
marine biotechnologist
Marine creatures live in the marine.
Marine is an adjective (marine life) and a noun (a member of the Marine Corps).
"Are you still in the marine?"
marine insurance
Marine-biologists.
the marine research is when you seek information in marine