系统初始化后进入由键盘、显示、SCI、故障处理等模块组成的后台程序。

After initialization, the system ran into the background program which includes keyboard, display module, SCI module, and fault processing module.

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它对我发生一些线程在后台运行。当应用程序进入的背景下，螺纹失去目标。

For me it happend some thread running in the background. while app entering in the background that thread losing its destination.

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