Device erasure occurs by utting the proper erase command sequence.

设备檫除由执行发生合适擦掉命令顺序。

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For example, the command "erase" makes the arrow 's image disappear and "display" makes it reappear.

例如，指令“擦除”会使箭头的图象消失而指令“显示”又会使它重现。

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For example, the command "erase" makes the arrow 's image disappear and "display" makes it reappear.

例如，指令“擦除”会使箭头的图象消失而指令“显示”又会使它重现。

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