The ultra-left movement claims it is a grassroots rebellion fighting against oppression, exploitation and corruption.

VOA: standard.2009.06.21

This is happening while making arm movement from the left into the right.

当手臂从左向右活动的时候，就会出现这样的情况。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Any genocidal movement that has left behind a written record has been shown to use the mechanism of disgust to dehumanize people and make them easier to kill.

任何有记录的种族灭绝运动,都利用过反感这个手段,来抹杀人性，使得更容易杀害他们。

耶鲁公开课 - 心理学导论课程节选