那是托马斯·爱迪生(Thomas Edison)所描述的自己如何费尽心思来让白炽灯泡更加完美。
That is how Thomas Edison described his laborious attempts to perfect the incandescent light bulb.
今夜，在当年的殖民地赢得了决定自己命运的权利200多年以后，让美利坚合众国更加完美的任务又向前推进了一步。
Tonight, more than 200 years after a former colony won the right to determine its own destiny, the task of perfecting our union moves forward.
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