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1·We write it subject to conservation of mass.

要服从质量守恒定律。

2·Conservation of Mass. Conservation of Momentum. Stress Tensor.

质量守恒，动量守恒，应力张量。

3·So, what's the conservation of mass if we divide by the atomic masses here?

那么质量守恒是什么呢？，如果我们在这儿按原子质量划分？

4·We invoke Dalton's Law of molar proportions, we write it subject to conservation of mass.

我们援引了摩尔分数的道尔顿定律，要服从质量守恒定律。

5·Mathematical models use volumetrics. Darcy relationships, and conservation of mass to describe the reservoir.

数学模型利用体积法、达西关系式和质量守恒原理来描述油藏。

6·According to the law of conservation of mass, the mathematics model of Modified-Atmosphere Packaging (MAP) is educed.

根据质量守恒定律和果蔬采后呼吸生理，推导出薄膜气调包装(map)的数学模型。

7·Conservation of mass, momentum, and energy are used to solve for the liquid film thickness, velocity, and temperature.

通过求解质量守恒、动量守恒、能量守恒方程，获得液膜厚度、速度与温度等参数。

8·The dynamic system model is coupled with geothermal heat exchanger model and heat pump unit model, which is based on the conservation of mass and energy.

采用确定性模型法建立了热泵机组的模型，然后通过能量和质量守衡方程序建立了系统动态耦合模型。

9·Taking the henhouse as semi-obturation system, dynamic conservation of NH3 in henhouse under ventilation condition was analyzed based on the law of conservation of mass.

利用物质守恒原理，以鸡舍为半封闭系统，分析了鸡舍内NH3在通风状态下的动态守恒情况。

10·According to the Law of Conservation of Mass, we have established the mathematical model of heavy metal pollution in Le 'an River, and have attempted to find the solution to it.

根据质量守恒定律，建立乐安河重金属污染数学模型，并对其进行了求解。