In practice, one model is not always enough and a complex system may be represented by a range of models, from simple to complex.
在实践中，一个模型常常是不够的，复杂的系统可以用从简单到复杂的多个模型表示。
"Our financial system is extremely complex and interconnected, and Bear Stearns participated extensively in a range of critical markets," Bernanke said.
“我们的金融体系是极其复杂并有互联性，并且贝尔斯登广泛地参与了许多关键市场，”伯南克说。
The power-dependent complex dispersion relations for TE and TM waves in a lossy nonlinear guiding system with a wide range of absorption coefficients are simulated and analyzed.
模拟和分析了很宽吸收系数范围内非线性有损耗波导系统TE和TM波与功率有关的色散关系。
Freeway system operation is complex, so many management and technology problems are faced while seting up traffic guide system in province range.
由于系统管理的复杂性，建立省域高速公路网的交通诱导系统面临着诸多的管理问题和技术问题。
Freeway system operation is complex, so many management and technology problems are faced while seting up traffic guide system in province range.
由于系统管理的复杂性，建立省域高速公路网的交通诱导系统面临着诸多的管理问题和技术问题。
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