1. 函索：sell up 卖光 | send away for 函索 | send for 派人去请;召唤;索取 send in 呈报;送...参加比赛
2. 函购：send along 发送 | send away for 函购 | send away 发送
3. 函购某物：The ship radio sent out signals for help. 轮船上的无线电发出求助信号. | send away for 函购某物 | I sent away for some rare books. 我函购了几本罕见的书.