激光二级管的退化是一个特别麻烦的问题。
The problem of laser diode degradation was particularly troublesome.
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.
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