on/in the street用法
基本上二者都可以用，但除了以下几种特定的用法：1)专指「在户外」时就要用in the street。
如：It is dangerous to be in the street after dark.醉卧街头时,当流浪儿等当然是在户外，所以也是用in，而交通工具也是在户外走，所以也是用in。
2)当做在能力上「难以相比」时，也是用in，如in the same street.
如：Her clothes are not in the same street as yours.
3)专指街的地面时，就要用on，如丢纸屑，还有走在街面上时也用on。
4)广为人知时，也是用on。
如：Sue put it on the street, and now everyone knows.
5)专指华尔街日报时，就要用on。
如：I heard on the Street today that bank stocks are headed up.
7)指打折後的最低价，也是用on。
如：It lists at $2200 and can be got for about $1600 on the street.
