SASE

剑桥词典

abbreviation for self-addressed stamped envelope : an envelope with a stamp and your name and address on it that you send inside another envelope to an organization when you want a reply
（贴足邮资写明姓名地址的）回邮信封（self-addressed stamped envelope的缩写）
Please enclose an SASE with your application . 请随申请书附上贴足邮资写明姓名地址的回邮信封。
比较
sae 返回 SASE