It is the most common kind of control mode, is inexpensive structure simple, practical and convenient maintenance characteristic.

它是最常见的一种控制方式，具有价格低廉结构简单、实用、维修方便的特点。

youdao

MS: The fact is that this is very simple science, but as you know, for most of the earth's history, it has not been able to support a kind of life that we know.

莫：事实上这是一个简单的科学问题。但正如你所知：地球的绝大部分历史上，其资源是无法支撑我们现在这种生活的。

youdao

This kind of converter has many charactreistic. such as small volume, simple circuitry structure, high reliability. So it can meet the need of most practical application.

该转换器体积小、电路结构简单、工作可靠等特点，能满足大部分工业现场的使用要求。

youdao