现在研究自底向上开发实例中的继承。
We will now examine inheritance in a bottom-up development example.
这是一个硬件的开发实例，是US B到串口的轮换实例。
This is an example of the development of hardware, USB to Serial examples of the rotation.
一个现代的面向目标的开发实例是直线导引系统的拓扑优化。
One example of modern, goal-oriented development is the topology optimization of a linear guidance system.
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