the center of用什么介词
在the center of之前可用介词at  或者介词in。
at  the center of  在…中心,处于…中心,在…中心旁。
in  the center of  在…中心里。在…中央。
如
At the centre of the inquiry has been concern for the pensioners involved. 
调查的核心一直是对于牵涉其中的领取养老金者的关注。
At the centre of the lake, there is a pavilion.
湖心有一座亭子。
He had taken up a position in the centre of the room. 
他占据了房间中心的位置。
In the center of the hut a fire burned night and day from the beginning to the end of the year.
在小茅屋的中间终年不分昼夜地燃烧着炉火。
the center of用什么介词
前面用介词in,例如:
1.Fires were burning out of control in the center of the city.市中心的火势失去了控制。
2.He put the pile of chips in the center of the table and drew a card.他将一堆筹码堆在桌子中间,抽了一张牌。
3.The heart is located roughly in the center of the chest cavity.心脏大致位于胸腔的中央。