They say the United Nations complex humanitarian operation in this conflict-ridden province cannot function efficiently without their help.

VOA: standard.2009.03.28

Or take this value out of memory, run it through some other simple operation, stick it back in memory.

或者从记忆存储器中取出一个结果，在类似的操作中运行，再插回到存储器中。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's very important in the biological operation of human cells and that step is RNA splicing, or processing of this RNA, single stranded RNA that's produced by transcription.

而这对人类细胞生物运作至关重要,这个步骤就是RNA剪接,或者说是对RNA的加工,对转录出的单链RNA进行加工的步骤

耶鲁公开课 - 生物医学工程探索课程节选

In a brief statement from the White House, Mr.Obama stressed this will be a complex and challenging operation.

VOA: standard.2010.01.13

"There will be operation in this area. But it is now a matter of military judgment (of) what is the appropriate time."

VOA: standard.2009.10.12

British commanders say this Operation is making good progress, but in Afghanistan as a whole it has been a tough month, and in Britain public opinion-polls indicate public support is falling.

VOA: standard.2010.08.04

"They said,without this service, NGOs [non-governmental organizations and agencies will be unable to reach operation areas in the east and south of the country, and it is an area that is particularly insecure and difficult,"

VOA: standard.2009.08.02