The evolution of conflict between American and Iraq are remote cause of history and the root of America overthrowing Saddam;motional reason of reality is pretext of Bush censuring Saddam;the essential reason is American intends to control the oil of Iraq.

It emphasizes that the common law has a trait of immemorial history in source and accumulated experience in reason,and meanwhile it implies constitution concept which claim for power restriction in intrinsic logic.

On the historical reasons for the trend of thought of National Character reform in the period of New Culture Movement;

The article intends to find out some profound historical reasons and theoretical roots for the emergence of the serious mistakes and deviation made by Mao Zedong.

There are five main historical reasons for the prevalence of sexual love literature during Ming & Qing dynasties.

This paper has posed its historical reasons of the Third-Line Construction from three aspects: Firstly, preparation for wars is the main reason of the Third-Line Construction.

The historical factors relating to the name of Macedonian;

Indicating the effect of Chinese cities by geographical and historical factors,supplying some references to study on color of chinese citiy.