Matsukawa had carried out a field investigation on dinosaur tracks and strata concerned in SE Mongolia, N and NE China for about two months.

Commencing at the end of Rex period and maturing in the mid Repulic,the power restriction mechanism of ancient Roman Republic played a tremendously important role in the stability and prosperity of ancient Roman Republic,meanwhile,served as a precious legacy which the Roman left to their posterity in the aspect of intelligence and institution,it had great influence on later ages.

The studies on power restriction mechanism of ancient Greece and ancient Roman Republic are involved in many academic works, but there has been no article that is specialized in systematically expounding power restriction mechanism of ancient Greece and ancient Roman Republic.