bar是可数名词。
barn.酒吧；(出售饮料等的)柜台；(专售某类饮食的)小吃店，小馆子；
v.(用铁条或木条)封，堵；阻挡
There were some really strange characters hanging around the bar.
有些不三不四的人在酒吧周围游荡。
We met in a local bar much frequented by students.
我们在学生经常去的.一家酒吧里相遇。
The bar codes on the products are read by lasers.
产品上的条形码是用激光读取的。
