Looking at society out of railway circle could expand field of vision,and is beneficial to introducing ideas,renewing thinking,and using other s good quality or suggestions to remedy railways own defects.

The author points out that it is a requirement for development of Marxist theories as a discipline and for promoting naturalization of Marxism in China that we should carry out further studies on naturalization of Marxism in China with wider perspectives of research.

Objective To evaluate clinical value of Ultra-wide sight echography in B-ultrasound.