最后的解决方案就是重新启动窗口管理器，然后一切就会正常。
The best solution is to restart your window manager, and all will be well.
最后，您仅需要输入不带任何参数的fg就可以重新启动最近停止的作业，如本例中的job 1。
Finally, if you just type fg with no parameters, you can restart the most recently stopped job, job 1 in this case.
第三行显示三幅图像，但是最后一幅图像(套娃的头)实际上是一幅暂停的视频，设置为在它前面打出触摸手势时就重新启动为活动的视频。
The third row shows three images, but the last image (of the doll's head) is really a paused video set to restart as a live video when a touch-gesture is performed before it.
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