爱迪生不相信碳可作灯丝用,所以一开始就用铂合金作灯丝。
Originally Edison used platinum alloys for the filament, in the belief that carbon was impracticable.
在小照明灯中,所有的空气都从灯泡中抽出,形成真空,以防炽热的灯丝被烧毁。
In small lamps, all the air is pumped from the glass bulb, forming a vacuum, which prevents the white-hot filament from burning away.