两个间接计算法的正确性由是一个名为策为循环流程 模型 ( circular flow model )的东西引申出来的。一个人的所生产的东西的价值、一个人的收入和一个人的开支并不一定一样，但是对于一个经济体系来说，所有产品...
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The model of three-dimensional flow in circular bend tube which is widely used in gas exchange system of internal combustion engine is developed in this paper.
建立了内燃机换气系统普遍使用的弯曲圆形管道气体流场计算的三维模型及有关边界条件。
The cutting model of circular tool is set up with least energy by theoretic analysis, the flow direction is forecasted, and the feasibility is validated.
应用最小能量法建立了圆弧刃切削的切削模型，预测分析了其流屑方向，进行了试验验证。
Our First Model: The Circular-Flow Diagram The circular-flow diagram is a visual model of the economy that shows how dollars flow through markets among households and firms.
循环流动图是经济的视觉模型，展示美圆（ 货币）是如何通过市场在家庭与企业之间流 动的。
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