英语语法分析

Kinematic equation of one-dimensional isoentropic nonsteady air was used to calculate system parameters for reference of design and experiment.

文中利用一维等熵非定常气体的运动方程计算系统的各参数，并把所得参数作为设计和试验的参考数据。

Nonsteady flow method is usually used to conduct water drive test for low permeability reservoir, but it is less accurate and cannot meet production need.

通常对于低渗储层进行水驱油测试采用非稳定流方法，但该测试方法准确性较差，不能满足生产要求。

Aimed at nonsteady spray combustion flow problems of regenerative liquid propellant gun (RLPG) in process of interior ballistic, mathematical model was established, and numerical method was derived.

针对再生式液体发射药火炮(RLPG)内弹道过程中非稳态喷雾燃烧流动问题，建立了数学模型，给出了具体的计算方法。