然而，这消耗较多功率且在低功率应用中是不合需要的。

However, this consumes more power and is undesirable in low power applications.

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因此，本发明可防 止该屏幕不合需要地移动，因而使用户可舒适地观看图像。

Therefore, the present invention can prevent the screen from undesirably moving, thus making it possible for a user to comfortably watch images.

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实际上，这个步骤有太多不合需要的结果和风险，许多测试的质量和覆盖度都不足。

In practice, this step has too many undesirable consequences and the risk that much of the testing is of insufficient quality and coverage.

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