These are all examples where CPR with mouth-to-mouth breathing may be more helpful that hands-only CPR.

VOA: special.2009.06.09

What do you think? Even with these glasses on, I can see no hands up, any suggestions? Somebody help me out.

戴着眼镜我也能看出来没人举手，有想法么？大家来帮帮我吧，你们对这个算法的增长率是怎么认为的？

麻省理工公开课 - 计算机科学及编程导论课程节选

And in fact, an example of a methodological attempt was done by Henry Gleitman at University of Pennsylvania, who built a tickle machine, which was this box with these two giant hands that went "r-r-r-r."

实际上,宾夕法尼亚大学的亨利·葛雷曼,曾经进行过研究方法上的尝试,他发明了一台挠痒痒的机器,这是一个装有两只大手的箱子,双手会不停的去挠痒痒

耶鲁公开课 - 心理学导论课程节选