1Polanyi,m. . Thc Study Of Man. London:routledge&Kegan Paul,1957,12.
2We can know more than we cad tell,See Pohnyi. M,The Tacit Dimension, London: Roufledge&Kegan Paul-1966, P4.
3Steinberg,R.. J,What Do we Know About Tacit Knowledge?Making the TacR Become Explocit,see Steinberg,R .J&Horvath,J. A,ed,Tacit Knowledge in professional Practice:researcher and practitioner perspoctiws, London: Lawrence Edbaum Associates inc, c1999, P236.