把它扔進郵筒，要不然就讓你的秘書發份傳真。Pop it in the post, or get your secretary to fax it.我只需把它打印出來，然后投進郵筒。I shall just print this out and put it in the post.他在郵筒前停了下來,把信投了進去.He stopped at the mailbox and dropped the letter in....

“郵筒”的英語可以翻譯為：pillar-box，postbox，mailbox，mail drop，pillar box ...