The U.S.administration is also trying to adapt to the changing situation in Afghanistan.

VOA: standard.2009.10.12

You have a very, very changing demographic situation in the American South and its political culture has to respond to that.

你可以想象,当时的美国南方,人口流动是非常厉害的,所以当时的政治文化必须做出相应的调整

耶鲁公开课 - 美国内战与重建课程节选

0% of participants eyesight improved significantly, as a result of just changing the situation.

0%的参与者的视力有明显改善，仅仅是在改变情境的情况下。

哈佛公开课 - 幸福课课程节选