1. 退还：send away 发送 | send back 退还 | send binary file 发送二进制文件

2. 退还不要, 退货, 发送回来：send away/off for sth. 写信索取, 邮购 | send back 退还不要, 退货, 发送回来 | send down = cause to go down 使下降

3. 送回,退还：send away for 函索 | send back 送回,退还 | send for 派人去请,召唤,索取

4. send back在线翻译

4. 還：遇: interview | 還: send back | 肝: liver

1. refer (a matter or legal case) to another committee or authority or court for decision

    Synonym: remitremand