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。
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