But residents in Mogadishu say al-Shabab fighters have been searching vehicles Wednesday at various checkpoints set up in areas under their control.

VOA: standard.2009.08.26

We're going to differentiate with respect to q1, the thing we're trying--our control variable, the thing we're trying to maximize the thing with respect to and set it equal to 0.

对q1求导,q1是控制变量,也就是我们想要求出的最大值,令它等于0

耶鲁公开课 - 博弈论课程节选

But the military government is set to maintain tight control over the vote amid calls by Burmese political activists for the international community to boycott the election result.

VOA: standard.2010.07.27