设置交换机当1900开始工作后,先运行POST,此时每个端口的发光二级管(LEDs)是绿颜色的,当POST完成后,LEDs起头闪烁之后熄灭;假如POST发现某个端口出问题了的话,系统LED和那个出问题的端口的LED起头变黄.
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最简单的例子是开关(输入)和发光二级管(输出)。
The simplest examples are switches (inputs) and LEDs (outputs).
发光二级管的应用进程速度大大超过了专家两年前的预测。
The switch to LEDs is proceeding far more rapidly than experts had predicted just two years ago.
结论：新型的发光二级管型光固化灯在黏结效能上优于传统的卤素灯泡型光固化灯。
CONCLUSION: the new type of LED spectrum was better than the traditional spectrum of the halogen lamp.
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