Holder must pledge to acknowledge receipt of all controlled copies sent to them.

持有者必须承诺把承认所有受控副本文件收据寄发给他们。

youdao

But Friday, he offered to postpone the vote if Holder followed through on an earlier pledge to turn over some of the documents.

CNN: STORY HIGHLIGHTS

Sen Paul - a critic of the use of drones - demanded a pledge from either President Obama or Attorney General Eric Holder that drones would not be used in the US to kill terror suspects who are US citizens.

BBC: US & Canada