单级的

Therefore, in the lower part load, the gas engine heat pump at a lower energy efficiency.

因此在部分负荷较低的情况下，燃气机单级离心泵的一次能源利用率较低。

One-step autotrophic nitrogen removal process, which means theexperiment is carried out in one re.

单级自养脱氮技术就是在不外加有机碳源且在一个反应器内实现脱氮的积极探索，该工艺具有简易、高效、低能耗的显著优点。

The results showed that both continuous and intermittent aeration system could implement completely autotrophic nitrogen removal.

结果表明，连续和间歇2种曝气方式均可实现单级自养脱氮，在进水氨氮浓度为160 mg/L左右，温度30℃±2℃，pH值7.8～8.2，HRT为2 d，DO为0.8～1.0 mg/L的条件下，连续曝气系统的氨氮转化率和总氮去除率分别达到80%和70%。

The classification,main modes,scope of application,advantages and defects of city natural gas transmission and distribution network are compared,the principle for selecting gas transmission and distribution network is put forward,and the application of regulator box and PE pipe in a medium-pressure single stage system is discussed.

对城镇天然气输配管网分级、主要型式、适用范围、优缺点进行了比较，提出了燃气输配管网选择原则，探讨了调压柜和PE管在中压单级管网系统中的应用。

Stainless steel gasreducer:Double stage type diaphragm pressure-reducing structure and stainless steel diaphragm are suitable for corrosive gas,standard gas,clean gas and mixed gas.

不锈钢气体减压器：单级式膜片减压结构，不锈钢膜片，保证输出压力的稳定，适用于腐蚀性气体、标准气体、纯净气体、与混合气体。

Stainless steel gasreducer:single stage type diaphragm pressure-reducing structure and stainless steel diaphragm are suitable for corrosive gas,standard gas,clean gas and mixed gas.

黄铜气体减压器：单级式膜片减压结构，不锈钢膜片，保证输出压力的稳定，适用于腐蚀性气体、标准气体、纯净气体、与混合气体。

This paper presents design and experimental resultsfor a high performance single stage transonic fan with design pressureratio 2.3 and design efficiency 0.88 at high tip speed 510m/s (relativeMach number reaches 1.72) and low aspect ratio.

本文介绍一高性能单级跨音速风扇的设计与试验结果。该风扇设计压比2.3，设计效率0.88，具有高切线速度510 m/s(相对马赫数达1.72)和低展弦比。

Nevertheless, single-stage pump is not one hundred percent of the balance, it also uses a thrust bearing.

纵然如此，单级泵也不是百分之百的平衡，所以还采用止推轴承。

These are single stage/helical screw direct drive compressors with their engine speed synchronized with the compressor suction.

这些压缩机都是单级/螺旋型螺杆式直接驱动压缩机，它们的发动机转速与压缩机抽吸速度同步。

The substitution method that has an outlook most is reverse osmosis condenses, but tall permeate pressure make its very hard only course system condenses fruit juice to exceed 25~30 ° Bx.

最有前途的替代法是反渗透浓缩，但高渗透压使其很难以单级系统把果汁浓缩到超过25~30°Bx。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。