The screen will remain black for 15 seconds.
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 20:41:37
The screen will remain black for 15 seconds.
The screen will remain black for 15 seconds.
The screen will remain black for 15 seconds.
屏幕黑屏了15秒.
屏幕将保持黑屏状态15秒钟
黑屏15秒钟