postboxes

英 [ˈpəʊstbɒksɪz]

美

n.  邮筒; 邮箱
postbox的复数

柯林斯词典

• 邮筒；信箱
  Apostboxis a metal box in a public place, where you put letters and packets to be collected. They are then sorted and delivered.

in AM, use 美国英语用 mailbox

双语例句