在前面板的右侧提供了一个减光控制旋扭，由此也可以激发灯泡试验。
A dimmer control knob is provided on the right side of the front panel which also activates the lamp test.
人们经常会举爱迪生发明灯泡的例子，在他试验了上千种材料后终于找到了一种合适的材料发明了白炽灯。
An example he frequently USES is when Thomas Edison tested thousands of materials before he discovered the right one for his incandescent lamp.
托马斯·爱迪生发明了灯泡，他从1878年开始试验，到1879年的10月21日发明了一个可以正常工作的电灯泡。
Thomas Alva Edison invented the light bulb. He began his experiments in 1878 and by 21 October 1879 he made a working electric light bulb.
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