“灯丝”造句

灯丝在电灯中电加时成白炽状态。
A fine wire is heated electrically to incandescence in an electric lamp.

电子显微镜中的电子源,是一加热的灯丝.
The source of electrons in an electron microscope is a heated filament.

电子从热灯丝逸出,叫做热电子发射.
The liberation of electrons from a hot wire is called thermionic emission.

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