Edison, I see that the electrical industry has two competing systems right now: AC and DC.

爱迪生 我很清楚 电力行业现在有两种相互竞争的系统：交流和直流。

In the early days of the electrical industry, there had been lots of different small light bulb manufacturers, but by now they had largely been consolidated into these big corporations, each dominant in a particular part of the world.

在电气工业发展的早期，有很多不同的小型灯泡制造商，但到现在为止，它们大部分已经被并入这些大公司了，每个国家都在世界的某个特定地区占据主导地位。