Safe medium is way and road to process problem. The article explain a process to sending and receiving a letter by digital ID of E-mail, mentions that CA center can assume duty of the safe medium.

安全中介是解决这一问题的方法和途径，本文以电子邮件数字证书为例，讲述发送接收加密信件的过程，说明CA中心可以担当安全中介的重任。

youdao

PC as the center of the future digital family in data store and process, it is a critical requirement that exchange data between PC and cell phone, and manage the internal data of the cell phone.

PC作为数字家庭信息存储和数据处理的中心，如何在PC与手机之间进行数据交换，有效地管理手机内部信息资源，已经成为一个迫切的需求。

youdao

Active noise control (ANC) is a new high technology integrated with acoustic, adaptive control and digital signal process and it has become the research focus center of noise control.

主动噪声控制是集声学、自适应控制及数字信号处理等技术为一体的高新技术，已成为国内外噪声控制界的研究热点。

youdao

Carlson is arranging guided tours for visitors to Kodak's medical-imaging facility in the Olympic Village and the press center (where Kodak will process 5 million digital images), along with tickets to carefully selected Olympic events and perks like visits to the Great Wall and trips to Beijing's Silk Market.

FORBES: Magazine Article