Now those of you who have been in other classes where you've used these will know what these are and you may even have the clicker already.

上过其它课程的同学可能知道,有的也许已经拿到表决器了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If you walk into a class with 5th graders, who on day one are years behind where they should be and hate school and are kind of like to hate you because of it.

如果你走进一个五年级教室，学生们从第一天开始就落后很多,恨学校，因此也恨你。

哈佛公开课 - 幸福课课程节选