This paper obtains a uniform a priori estimate of classical solution to the Cauchy problem for quasilinear hyperbolic system by using the method of characteristic,which gives a lower bound on life-span of the classical solution.

Three New Records of Fish in Yunnan and Analysis of the Value of Faunal Presence of Fish in the Tuoniang River;

Heidegger s"Ontological Difference" and Mahayana s"Twi-satyas"Theory;