The value of the exploitation&use of coal resources has the coupling feature of positive and negative value.
煤炭资源的开发利用呈现出明显的正、负价值的耦合性。
Dynamic mathematical model of ball mill pulverizing system with storage bunker is obtained by mechanism analysis, this model demonstrates the nonlinear and strong coupling feature of ball mill system.
通过机理分析的方法建立了中间储仓式制粉系统球磨机的动态数学模型，给出了其解析表达式，从理论上揭示了球磨机系统的非线性、强耦合特征。
Class is the basic element of class structure. It is research that class should hold four basic feature: integrality and sufficiency, primitiveness, high cohesion, low coupling in this paper.
类是类结构的基本元素，本文研究了良好的类应当具备的四个基本特征：完整性和充分性、原子性、高内聚、低耦合。
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