是一種語言習慣。” 。。。 http://www.zhihu.com/question/27976992
.... "Since it was originally an orally transmitted tradition, Buddhism
likes repetition, especially three-fold repetition" .....
..... "The threefold repetition marks off the recitation from ordinary
uses of speech, and ensures that the mind dwells on the meaning of each
affirmation at least once." .... An Introduction to Buddhism: Teachings,
History and Practices by Peter Harvey