最后分别模拟放大系统采用黑盒模型和两能级模型，有八个WDM光信号输入时，放大后的光谱图。

Finally, when there were eight WDM optical input signals, using the black box model and two level model respectively, we simulated the amplified optical spectrum.

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由于所有这些都被包括在黑盒指定的航行器中，在这个层级上该模型不需要指明任何内部事物。

Since all of this was included in the black box designated aircraft, the model could not speak of anything inside it at this level.

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在分析模型层级中，我们考虑为黑盒元素的逻辑和分发元素，是由硬件、软件、人员和信息结合而成的。

In the analysis model level, the elements we consider to be black boxes are logical and distribution elements, made up of some combination of hardware, software, people, and information.

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