He says a reattachment operation can take many hours.

VOA: special.2011.02.02

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

In Kandahar city itself, Afghan police and military forces are to take the lead in the operation.

VOA: standard.2010.05.26

Now that he's back home, his doctor wants him to take some expensive post-operation tests.

VOA: standard.2010.04.08

"I thought that the American medical system was going to take away my life savings and essentially ruin any prospects I had for a pleasant retirement after the operation."

VOA: standard.2010.04.08

"But the problem on the relief well is not simply drilling all the way down, it is also connecting it up, and that is a delicate operation that could take some time."

VOA: standard.2010.07.16

The rebellion has become increasingly violent. Worried by the growing security threat posed by the Maoists, the government is preparing to mount a big security operation called Operation Greenhunt to take out the insurgents.

VOA: standard.2009.11.04