Generally, you write one unit test per model.
一般情况下，要为每个模型编写一个单元测试。
In the classical ruin model, it is assumed that the insurers premium income is a constant at per unit time.
经典的破产模型都是假定保险公司按照单位时间常数速率收取保险费。
The expected cost per unit -time for infinite time span is analyzed strictly under the mathematical model constructed, and the optimum age replacement decision is also discussed.
在建立数学模型的基础上，分析了系统长期单位时间内的期望费用，并讨论了最优年龄替换决策。
Tea crop area, harvesting area, per unit area yield, gross output, and the total agricultural output value of the tea industry are analyzed and assessed by using regression model analysis.
运用回归模型对茶叶种植面积、采收面积、单位面积产量、总产量、茶叶农业总产值进行分析和预测。
Using the single mass-spring model, we study the gaits of a hopping robot for the purpose of minimizing the loss of energy per unit distance covered and present our expressions of energy consumption.
基于单质量-弹簧模型，研究了能够使弹跳机器人单位距离能量损失最小的步态，给出了能量的消耗表达式。
On the base of geological block model, we used geostatistics for modeling on the grade of geological block, and then calculate its grade per block unit using Ordinary Kriging method.
在地质体块体模型的基础上，采用地质统计学的方法对矿体的品位进行建模，通过普通克里格方法计算块体单元的品位。
Taking the minimum cost per unit power generation as the objective function, a thermo-economic optimization model for gas and steam combined cycle power generation system is established.
以单位发电量最低成本为目标函数，建立了燃气-蒸汽联合循环发电系统的热经济学优化模型。
China has struggled to attain these goals with anything less than 10 percent growth, because the old model was not generating enough jobs per unit of output.
而为了实现以上的目标，中国完全可以放弃二位数的经济增速，因为旧的经济增长模式的单位产量显然不能创造足够多的就业机会。
China has struggled to attain these goals with anything less than 10 percent growth, because the old model was not generating enough jobs per unit of output.
而为了实现以上的目标，中国完全可以放弃二位数的经济增速，因为旧的经济增长模式的单位产量显然不能创造足够多的就业机会。
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