当这些按钮之一是推动下，在前面和后面的蓝色系统状态指示灯闪烁液晶显示器面板，直到其中一个按键被按下了。

When one of these buttons is pushed, the LCD panel on the front and the blue system status indicator on the back blink until one of the buttons is pushed again.

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举例来说，最早类型的光纤通信系统可能是，在其中一盏灯，是按顺序从隐藏的视线固定期之间的时期，正处于平原的看法。

For example, the earliest types of optical communication systems were probably ones in which a lamp was sequentially hidden from sight for fixed periods between periods of being in plain view.

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举例来说，最早类型的光纤通信系统可能是，在其中一盏灯，是按顺序从隐藏的视线固定期之间的时期，正处于平原的看法。

For example, the earliest types of optical communication systems were probably ones in which a lamp was sequentially hidden from sight for fixed periods between periods of being in plain view.

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