此页包含允许您恢复您的连接设备的原始工厂固件的二进制图像文件。
This page contains binary image files that allow you to restore your Nexus device's original factory firmware.
可选的：创建单元测试以确保原始目标对象的工厂方法仍返回正确的非模仿对象。
Optional: create a unit test to assure that the original target object's factory method still returns the correct, non-mock object.
因为我们覆盖了工厂方法来编写这个测试，所以其结果是：我们的测试不再包括任何原始创建代码(现在它在基类的工厂方法内部)。
Because we overrode the factory method to write this test, it turns out that we no longer have any test coverage of the original creation code (which is now inside the base class's factory method).
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