你能给我一个回邮信封吗？

Can you give me a return envelop?

请附上写明姓名地址的回邮信封。

Please enclose a self-addressed envelope.

兹附上贴有邮票并写好地址的回邮信封。

I enclose a stamped addressed envelope for your reply.

面积过小或邮费不足的回邮信封将导致订票受阻延。

Inappropriate envelope size or insufficient mailing fee may lead to delay in processing the order.

运动员须知将使用报名者提供之回邮信封寄出，为免误邮，请清楚填写地址。

Runner's Guide will be sent in SELF-ADDRESSED envelopes provided by the applicants, please write the address clearly to avoid any lost mailing.