cathode spot

例句：

1. 1. Theresearchers found that the cathode spotwas responsible for the emission of light.
   研究人员发现，阴极斑点是发光的原因。
2. 2.The cathode spot is a crucialcomponent in the operation of the electric furnace.
   阴极斑点是电炉运行的关键部件。
3. 3. The cathode spot is alsoknown as the "spot" on thecathode surface.
   阴极斑点也被称为阴极表面的“斑点”。