Science can be hands-on, you might be down at the lake picking up algae and studying them or something, that would be hands-on.

科学研究也是要动手的,你可能会到湖底,收集水藻并研究它们,这就是动手操作

耶鲁公开课 - 生物医学工程探索课程节选

I move my hands around, my mouth is going up and down, it walks from one part of the stage to the other part of the stage.

我的双手可以挥舞,我的嘴唇可以翕张,我可以从讲台的一处,走到另一处

耶鲁公开课 - 死亡课程节选