Britain still boasts the cheapest postal service
When you've stuck the stamps on your letter you can put it in the postbox outside.
当你在信上贴好邮票后，你便能把它投到外面的邮筒中去了。
The army sent me a postcard acknowledging my request.
军队寄给我一张明信片告知我的申请书已收到。
Author's detailed mail address: Postcode, address.
参赛者详细的通讯地址：邮政编码、居住地址。