ph.

1. Certain classes of mail have to be signed for when they are delivered.
    某些类的邮件在送达时必须签收。

1. 签收：sign away 签字放弃 | sign for 签收 | sign in 签到

2. 签收某物：excuse the mess 请原谅这么乱 | sign for 签收某物 | make a mess of sth 把...东西弄的一团糟