what is the grammar of "over in"?I can not understand.I know over means being up to something,but what about "over in "?
I read this sentence in a book:     I just took part in a study over in the Psychology Department.   Why do we add over in front of in the here?
See these sentences:     See there, it seems that someone is inside the house. OVER   See there, it seems that someone is in the house.   Another example:     The doctors found two bullets in his body. OVER   The doctors found two bullets inside his body.   Certainly, both are interchangeable, aren't they? But in the bullet's example, the second one looks natural. I'm not sure why. Is it something that bullets were first out and then they went inside? But if that's the case, someone is in the house is also okay. That person too was out first!