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。
Children of educated and upper-middle-class parents turn out to be far more curious, even at early ages, than children of working-class and lower-class families.
比起工人阶级和下层家庭的孩子，受过教育的孩子以及中上层家庭的孩子甚至在很小的时候就更有好奇心。
Children of educated and upper-middle-class parents turn out to be far more curious, even at early ages, than children of working class and lower class families.
受过教育的孩子以及中上层家庭的孩子甚至在很小的时候就比工人阶级和下层家庭的孩子更有好奇心。
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。
The last time the Pew Research Centre asked, in a poll in 2008, 91% of respondents put themselves in the upper-middle, middle or lower-middle class.
在2008年最近的一次民意调查中，美国佩尤研究中心发现91%的被调查者将自己放在中产阶级或中低产阶级的行列。
For the majority of lower - to upper-middle-class children of my generation raised in the US, the means to a sufficient standard of living were fairly easily within reach.
在美国，对于我这一代的多数人来说，不管是底层、中产阶层还是上流阶层的子弟，要达到宽裕的生活水准相对而言较为轻松。
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。
The treatment gap was over 75% in low-income countries and over 50% in most lower middle - and upper middle-income countries, while many high-income countries had gaps of less than 10%.
低收入国家存在75%以上的治疗缺口，大多数中低收入国家存在50%以上，而很多高收入国家的治疗缺口不到10%。
When the battery is being charged, magnesium antimonide in the middle layer breaks down into the pure elements and so the upper and lower layers deepen.
当电池正在充电，在中间层的组合物分解成纯元素，所以上下层变得更厚了。
If you look at lower-middle income countries, such as China, or upper-middle income ones, like Argentina, you find that what kills people there is the same as in the West (see chart 2). Four-fifths.
看看中低收入国家(如中国)和中高收入国家(如阿根廷)的统计数据，你会发现这些国家和西方国家一样，导致人们死亡的原因是相同的(见表2)。
There are upper berths, middle berths and lower berths but no compartments.
铺位有上铺、中铺和下铺，但是没有包房。
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。
The stone free rates after shock wave lithotripsy for upper, middle and lower ureteral calculi were 74.1, 100 and 75.9% respectively.
对输尿管上部，中部和下部结石进行冲击波碎石术后结石排空率分别为74.1,100和75.9%。
Osaka Street underground at upper, middle and lower three levels have their own characteristics.
大阪的地下街分上、中、下三层，层层各有自己的特色。
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。
The experiment showed that the SOD activity in middle node leaves of Psophocarpus tetragonolobus was higher than that in lower and upper ones.
测定实验表明：位于四棱豆植株中部节位叶片中的SOD活性高于植株下部和上部节位叶片中的SOD活性；
Every river has its upper, middle and lower reaches.
每条河流都有上游、中游、下游。
The bite: from the middle upper and lower garment pieces into a layer, positive topstitching. For the first, waist cuff.
咬缝：由上下层衣片咬住中间一层衣片，正面缉明线。用于装袖头、腰头等。
Practically every river has an upper, a middle and a lower part.
事实上每条河都有上游、中游和下游。
With the middle finger with both hands to push around the upper and lower eyelids wipe eyes 27 times.
用两手中指往返推擦左右眼睛的上下眼睑各27次。
Qixingyan in the Lijiang River on the east coast, is one of Guilin's most famous caves, divided into upper, middle and lower three floors.
七星岩在漓江东岸，是桂林最著名的岩洞，分上、中、下三层。 洞内有地下河，地下画廊，以及许多石钟乳、石笋、石柱等。
These 2 crusts show 3 structural layers: compact upper layer, porous middle layer and compact lower layer.
这2个结壳从结构上分为3层：致密型上层、疏松型中层和致密型下层。
A laminated composite bar of rectangular cross section consists of a middle portion of one material as well as upper and lower identical cover plates of another material.
一矩形横截面的叠层复合材料杆，由以一种材料为中心部分，及另一种材料的上下两相同的盖板所组成。
The strata of Mesozoic and Cenozoic in the basin can be divided into three parts, Middle Jurassic (Longjiagou Formation ), Lower Cretaceous and Upper Miocene (Baode Formation ).
根据化石组合，龙家沟盆地的地层可划分为中侏罗统龙家沟组，上白垩统及上中新统保德组。
The heavy rain is presented under the condition of the strong positive vorticity, convergence, vapor flux convergence in middle and lower troposphere and stronger divergence at upper troposphere.
大暴雨发生在对流层中低层为气旋性涡旋、流场辐合加强、水汽通量增加、水汽通量辐合加强，并伴有高层较强辐散的情况下。
In operation all inspection doors must be closed. Low voltage lighting need to be placed at upper lower and middle section inspection door.
本机在工作时，所有检视门必须全部关闭，并应在上部、下部及中部经常打开的检视门处安设低压照明设备。
NE series plate chain bucket elevator is composed of upper section middle casing lower section moving members driving unit maintenance platform and hanging racks.
提升机由上部区段、中部机壳、下部区段、运行部件、驱动装置、检修平台和吊架组成。
Rhizomes curved; ocrea: lower part green, upper part brown, cleft to middle.
根状茎弯曲；托叶鞘：下半部分绿色，上半部分棕色，半裂至中部。
Unless the upper part of Ningqiang Formation maybe belongs to Middle Silurian, the others belong to lower Silurian.
本区绝大部分地层为下志留统，只有宁强组上部可能为中志留统。
Unless the upper part of Ningqiang Formation maybe belongs to Middle Silurian, the others belong to lower Silurian.
本区绝大部分地层为下志留统，只有宁强组上部可能为中志留统。
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