This article ,using the grading management of "three-grade assessment and three coupling" by Songzi City Public Security Bureau of Hubei Province as the sample, argues the "four necessary" in the management mechanism of public security groups which is efficient in the long run, i.

This paper has observed the significance of Laozi s methodology through the dynamic process of east and west thinking development,and proposed that the relationship between Tao,one,two and three is circularly progressive,which can be divided into three levels, the separation of the origin,the separation of philosophy and the separation of aesthetics.

The Japanese have long favoured odd numbers and especially like to use "three" to describe things.

This article discusses the origin and features of the number “three”.

Comparison and analysis of Ihe word number "three" are made about Ihe same implications and characteristics among the cultures of various nationalities in the East and the West.

Explanation of triple absorption process for sulphuric acid production from off-gases with high concentration of sulphur dioxide;

Application of "3-3-4" Drug Maintenance Examination Method;