The water resources which is one kind of important natural resources, Especially in the edge of the loess plateau—the loess district on the Weibei mesa, appears particularly important.
水资源作为一种重要的自然资源，尤其是在黄土高原的边缘——渭北黄土台原区，显得尤为重要。
2
It is shown that with the content of CB raised, the burning rate of the propellant is increased and their plateau (or mesa) zone translate into higher pressure;