This paper introduces control of motors by using frequency-transformer, which changes two kinds of speed(faster and slower) into gearless speed regulation.
采用变频器进行电动机控制，将原来只有快、慢两个速度的电动机变成了无级调速；
Several changes have been made to the data types that JDBC supports and, as a part of the changes, two new data types have been added.
JDBC所支持的数据类型作了几个改变，其中之一是增加了两种新的数据类型。
This release included a large number of changes-two in particular being the introduction of a new optimization framework (Tree SSA) and support for autovectorization.
这个发行版包含很多变化—其中两个特别的变化是引入了新的优化框架(Treessa)和支持自动向量化(autovectorization)。
The bent shock wave is reflected at the wall. As the flow speed changes, two kinds of shock reflection have been observed.
弯曲的激波与壁面进一步作用后发生反射，由于波前气流速度不同，这种反射存在规则反射和马赫反射两种类型；
The bent shock wave is reflected at the wall. As the flow speed changes, two kinds of shock reflection have been observed.
弯曲的激波与壁面进一步作用后发生反射，由于波前气流速度不同，这种反射存在规则反射和马赫反射两种类型；
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