And key update is one of the important problems in this subject.

而组播密钥更新是其中的一个热点问题。

youdao

Public key cryptosystem is one of the most important research subject in modern cryptography.

公钥密码系统是现代密码学最重要的研究课题之一。

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Safe production is of key importance to offshore platforms, and of this subject explosion prevention is one of key technologies.

海洋石油平台的安全生产至关重要，防爆技术是石油平台工程的关键技术之一。

youdao

On the subject of North Korea, ElBaradei said there are two key issues: "One is its obsession with security and the possibility of regime change by the U.S.

VOA: standard.2009.11.04

Encouraging people to become active citizens in the so-called Big Society was one of the Conservatives' key themes, he said, and citizenship teaching was the ideal subject to aid this.

BBC: Teachers fear for future of citizenship lessons

To summarize: you prep for thoughtful discussion of a subject, even working through key points with a producer, only to be ambushed in one way or another on air.

FORBES: Why I rarely do TV