This means that the material balances around the stages are actually differential equations and each equation includes holdup as a variable.

这就意味着，在某一个阶段的前后物料平衡函数实际上是一个微分方程，而每一个方程都以一个停滞为变量。

youdao

Material balances, properties of feedstock, product and catalyst, energy consumption of the unit and the operation parameters before and after the revamping have been compared.

着重从物料平衡、原料及产品性质、催化剂性质、装置能耗、操作参数等方面与改造前进行了对比。

youdao

An improved mathematical model of metabolic flux analysis by material balances and linear programming method was established, which was first applied to batch culture process in this paper.

通过物料衡算和线性规划方法建立了进行代谢流分析的数学模型，并首次应用于批式培养过程。

youdao

Before that I worked in the material balances department, where we had to match supplies and demands for different products.

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