Conclusion: Backward walking can promote the foot pressure distribution more evenly, so the abilities of balance control and muscle regulation can be trained.
结论：背向走较正向走可以使足底各部位压力分布均匀，并能锻炼平衡控制能力及肌肉调节能力。
2
Use CFD software, the area of flow channel for forward skewed and backward skewed impeller was analyzed, and the differences in the performance of pressure between them was got.
Vulnerable eco-environment, too high population pressure, and backward techniques and extensive management are the main causes leading to desertification.