But that there is electric pressure in the semiconductor, the electron flow would not take place in it.
如果半导体内没有电压，其内部就不会产生电子流。It is usual to consider electric current as a flow of electrons from one point to another through a medium, or even through a vacuum.
通常认为，电流是通过某种介质甚至通过真空而从一点流向到另一点的电子流。Once the charge is powerful enough, an invisible flow of electrons flows from the cloud to the ground in a zig-zag pattern.
电荷一旦足够强大，无形的电子流就会以锯齿状从云端向大地流泻。Electron beam (EB) via electronic vacuum devices produce aggregates, intensive, has a definite direction of electron flow.
电子束（EB）即通过电真空器件产生聚合、密集的、具有一定方向的电子流。Electrical insulators are materials that are most resistant to the flow of electrons through them.
电的绝缘体是对流经他们的电子流有最大的电阻的物质。Electronic devices do not have movingparts, but do their work by means of small flows of electrons.
电子装置没有活动部件，而是靠小电子流来工作。The electric current is defined as a stream of electrons flowing through a conductor.
电流的定义就是通过导体的一股电子流。electronic flow away from the accident and the destruction of the ecology of the Earth hometown, and went to an unknown planet . . .
远离满布电子流和被事故破坏生态的地球故乡，去到一颗未知的行星…Sealed inside a glass tube, a stream of electrons carried a current through a vacuum between electrodes.
在一个密封的玻璃管内，带电的电子流在两电极间的真空中流动。