Where to go to the system that these people with finitenet want to support all sorts of different constructions, very big to our challenge, this firstly.
去哪儿网有限的这些人要支持各种不同结构的系统，对我们的挑战非常大，此其一。
2
The groundwater flow is simulated with the seepage model of heterogeneity isotrope, and the partial differential equations are solved with finite difference scheme of irregular triangle net.
以非均质各向同性渗流模型仿真地下水流，用不规则三角网格有限差分法求解三维数值仿真模型。
3
The groundwater flow is emulated with the seepage model of heterogeneity anti-isotope, and the partial differential equations are solved with finite difference scheme of irregular triangle net.