But the army's limited capacity for counterinsurgency operations and a weak central government have many concerned that the situation could worsen.

VOA: standard.2009.05.05

How many operations did it take me to do this?

这个并不重要，重要的是什么？

麻省理工公开课 - 计算机科学及编程导论课程节选

O Right there, order n. So I have order n operations at each level in the tree. And then how many levels deep am I? Well, that's the divide, right? So how many levels do I have?

在这儿,所以我在树的每个层次都要做O的操作,那个这棵有多少层呢？,这是一个除法，不是吗？

麻省理工公开课 - 计算机科学及编程导论课程节选

Defense analyst Talat Masood says the drone operations are potent symbols of what many Pakistanis believe is America's over-reliance on military power.

VOA: standard.2009.03.26

The sheer size of the service is at the heart of many complaints, such as long waiting times, canceled operations and poor nursing care.

VOA: standard.2009.09.24

But many of the NATO troops are not allowed to engage in combat operations or even to operate in violent parts of the country.

VOA: standard.2009.08.11

Many Western media analysts complain Iran's overseas broadcasting operations are biased.

VOA: standard.2009.11.16

"This notion that you do not want U.S.firms going overseas is really a mistake to begin with, because in many cases the operations abroad and the operations at home are actually complimentary to each other,".

VOA: standard.2009.05.04