Most of Russia's economic activity is centered in Moscow, where a sizable middle class has emerged.

俄罗斯大部分的经济活动集中在莫斯科，那里已经形成了一个相当可观的中产阶级。

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The theory of cooperative learning which is applied in English reading class in high school can change the traditional teacher-centered teaching type.

合作学习理论应用于高中英语阅读课教学可以改变传统的以教师为中心的课堂教学模式。

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Each session involves class discussion, some centered on lectures and others around business cases.

每节课会包括课堂讨论，部份集中在讲课内容，而另外时间则用于个案研究。

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As journalists, we distance ourselves from our subjects to avoid biases and to maintain objectiveness, but the focus of our class is centered on narrative journalism, which allows the reporter to establish a closer relationship with the people we interview.

CNN: 'There will never be justice'