2017厦门金海豚漫展:on the corner,in the corner,at the corner有啥区别

on the corner,in the corner,at the corner有啥区别 in/at/on the corner有什么区别????? at(in, on)the corner这些哪里不一样？ what goes round the world and stays in the corner on the river? in the river? In the hallways 还是 on the hallways in the hallways 还是 on the hallways in the lift OR on the lift ?? 请教the corner 是什么意思 what sits quietly in the corner, but flies everywhere in the world