Simplify the following text for a Grade 10 native English-speaking person.
Original: Technically , `` Grand Central Station '' is the name of the nearby post office , as well as the name of a previous rail station on the site , and is also used to refer to a New York City subway station at the same location .
Simplified: `` Grand Central Station '' is the name of the nearby post office , as well as the name of a previous rail station on the site , and it is also used to refer to a New York City subway station at the same location .