return receipt的用法和樣例：
例句
用作動(dòng)詞 (v.)
- For a service by mail, the date of acceptance marked on the receipt of the mail is the date of service.
郵寄送達的，以回執上注明的收件日期為送達日期。 - A non-delivery receipt that is sent to an e-mail sender when a message cannot be delivered to the intended recipient temporarily or permanently.
暫時(shí)或永久性地無(wú)法將郵件傳遞到目標收件人時(shí)發(fā)送給電子郵件發(fā)件人的未送達回執。
