To delve further into screen, read about split-screen mode and learn how you can prevent access to individual Windows with an old-fashioned lock.
要想进一步掌握Screen，可以研究一下多屏幕模式，学习如何用老式的锁防止对各个窗口的访问。
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Tracks of kicking doors are marks produced in the surface of the door by suspects who kick doors by feet to destroy the lock or door to tear them or split the door from the frame.