To attach the preparatory to the senior school these three classes were known officially, on speech days and in reports, as upper, middle, and lower second.
作为高中的预备班，在演讲日和报告中，这三个班被正式称为上、中、下二班。
In terms of class, digital divide exists among different types of workers and between the upper and middle classes and the lower class.
在阶级方面，不同类型的工作者，以及中上层阶级和下层阶级之间，都存在着数字鸿沟。
In that era you also had your upper-middle class and your lower-upper class and off on the side were the collar classes, white and blue.
在那个时代，中产阶级也有上部下部之分。此外，也可以分为白领阶级和蓝领阶级。
Society could be divided into upper, middle and lower classes. Most people in Japan think they belong to the middle classes.
社会大致可分为上、中、下三个不同阶层。大多数日本人认为自己属于中产阶级。
Society can be divided into upper, middle and lower classes.
社会大致可以分为上中下三个不同的阶层。
Society is divided into upper, middle and lower classes.
社会分为上层，中层和下层阶级。
Society is divided into upper, middle and lower classes.
社会分为上层、中层和下层阶级。
Based on the calculation and analysis of comprehensive index-polluted, shallow-seated groundwater in Dongtinghu district can be divided into 4 classes of serious, middle, lower and no pollution.
据综合污染指数计算分析，洞庭湖区域浅层地下水分为重度、中度、轻度和非污染4个等级。
Synthetic properties of these alloy are good, prime cost is lower, it may be applied to case of magnetic heads of middle and low classes.
这些合金综合性能良好，成本较低，可用于中低档磁头的外壳。
It reflects the community in the middle and lower classes of society, a broad, deep and detailed description of the lives of people of middle and lower classes, unique in the classical novels.
它反映社会中下层的社会生活，以广泛的、深刻的，细致的描述下层人民的生活面，在古典小说中独树一帜。
It reflects the community in the middle and lower classes of society, a broad, deep and detailed description of the lives of people of middle and lower classes, unique in the classical novels.
它反映社会中下层的社会生活，以广泛的、深刻的，细致的描述下层人民的生活面，在古典小说中独树一帜。
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