sit at the corner和sit in the corner 有什么区别吗?是否可以互换

意思不同
at the corner
街口
例句:
Raymond: Yes, I just picked up some drug at the corner drugstore.
雷蒙：有,我刚刚在街角的药房买了一些药品,
You can buy string, glue, paper-clips and suchlike (items) at the corner shop.
在街角小店里可以买到细绳、 胶水、 回形针之类的东西.
There's a grocer's at the corner of the street.
在街转弯处有一个食品杂货店.
in the corner
在拐角上
例句:
There's a pile of newspapers in the corner have you looked underneath?
角落里有一堆报纸--那底下你找过了吗?
They were chatting (away) in the corner.
他们在角落里闲谈.
She sat in the corner, watching my every move.
她坐在角落里注视著我的一举一动.