Using the notion of coefficient matrix and maximal element.We prove that the Lie algebra is semi-simple and it has no abelian two dimensional subalgebra.

利用系矩阵和极大项，证明了这类李代是半单李代有二维交换子代。

The two dimensional pseudohomogeneous model was often used for the non isothermal, non adiabatic fixed bed reactor that was widely used for the strongly exothermic reactions.

非恒温非绝固定床应器广泛应用于强放应体系。

A hail cloud model that is two dimensional elastic non-hydrostatic, uses a terrain-following coordinate system and includes double parameters for ice phase microphysics, has been developed.

建立了一个适用于复杂地形冰雹云模式。模式是二维、弹性、非静力、采用地形跟随坐标、包含双变参冰相微物理过程参化。