be located = 座落于 (the Forbidden City is located in Beijing City)紫禁城座落於北京市
in = 里面 (in my room, in mycar, in swimming pool) 在我的房间里, 在我的车子里, 在泳池里
on = 上面 (on table, on shelf, on roof) 在桌子上, 在架子上, 在屋顶上
at = 在某处, 指一个范围小的地方 (at school, at cinema, at home) 在学校, 在电影院, 在家。
