Then the south of Changjiang River developed quickly and the establishment and development of the culture in Qi and Liang dynasties had its origin of the central plain of China.
历经四百年北人南移,以江南为中心的齐梁文化的确立和发展,有其中原文脉。
Shock velocities in porous iron samples having different initial porosities have been measured using the pulse generation network.
通过脉冲网络法对不同初始孔隙度的多孔铁中冲击波速度的测量，结合多孔材料完全压实区冲击Ｈｕｇｏｎｉｏｔ方程，就初始孔隙度对冲击波在多孔铁中衰减特性的影响进行了研究。