rub-a-dub 隐藏摘要 
鼓声
rub 擦
rub-a-dub 鼓声
rub-up 擦净
http://www.ensalon.com/eduen/englishstudy/translation/transkill/200612/20061215230910.html - 基于20个网页
  相关词条
rub-a-dub-dub, three men in a tub