"While passions and politics can often obscure the hard work before us,let's be clear about what this moment demands, we are at war,"

VOA: standard.2010.01.19

You're going to work out what firm's demands are going to look like for each possible price they could set.

你们要解出,公司针对每一个其可能设定的价格,它的需求是什么

耶鲁公开课 - 博弈论课程节选

Those who live and work on the border say the problems are complicated, involving demands for better security and pleas for help from desperate migrants.

VOA: standard.2010.06.07