没有转义字符移动光标、改变前景和背景色、设置闪屏或反向等等，我们将回到电传打字机和其它机械辅助的时代。

With no escape sequences to move cursors, change foreground and background colors, set blinking or inverse, etc., we are back to Teletypewriters and other mechanical AIDS.

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讲弹簧机械正常的归零作用，同时要观察屏幕右上角的三角是否有反向动作。

Stresses the normal return of the mechanical spring, while the upper right corner of the screen to observe whether the triangle has a reverse action.

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