It's FREEPOST, so there's no need for a stamp.这是免费邮寄，不用贴邮票。Reply to Publicity Department, FREEPOST, Oxford University Press, Oxford.回信免费邮寄至牛津牛津大学出版社宣传部....

n.免费投邮，邮资总付...

FREEPOST的音标：FREEPOST的英式发音音标为：['fri:pəʊst]FREEPOST的美式发音音标为：['frɪpoʊst]...