我们仍然享有使用纸质图书和其它模拟类媒体的原有自由。
We still have the same old freedoms in using paper books and other analog media.
当您运行测试时，通常首先将Factory开关设置成返回模拟类。
When you run your tests you will usually begin by setting the Factory switch to return the simulated class.
它可分文本演示类、象再现类、程模拟类、理示意类、算绘图类等。
It can be classified into different categories, such as text demonstration, phenomenon reappearing, procedure simulation, principle illustration, calculating and drawing, etc.
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