单级

Biofilm is one of the key factors of the one-step completely autotrophic nitrogen removal process under high DO.

生物膜是高溶解氧条件下实现单级自养脱氮的一个关键因素。

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 feasibility of the analog birefringent structure is verified through an experiment.

实验中，用单级模拟双折射模块验证了该结构的可行性。

Box 275(26) Beijing 102413, China; 2 Beijing Institute of Nuclear Engineering, Beijing 100840, ChinaAbstract The studies of facts effecting on stripping Np from organic phase with HNO 3 and the determinations of Np in the stripping extractor with the reducer of n butyraldehyde are carried out.

单级实验结果表明，正丁醛的加入和延长正丁醛与镎的相互作用时间，有利于从有机相中反萃镎；正丁醛的加入对铀、钚分配比的影响不大；但铀浓度增加会增加镎的反萃。

The complexus of X organ and sinus gland was the main part of the neurosecretory of eyestalk.The X organ,which contained type I～VI neurosecretory cells,was located optic ganglion and was single nerve cell.

结果表明，克氏原螯虾眼柄神经内分泌系统主要组成部分为X器官-窦腺复合体。X器官分布在视神经节上，由I~VI型6种神经分泌细胞构成，均为单级神经元。I~VI型分泌细胞类型及数量在不同生长期存在差异。

Design and analysis of an improved single-stage active power factor corrector.

一种新型单级有源功率因数校正电路的设计分析。

Will therefore use the transmission efficiency high single stage deceleration driving axle to become in the future the heavy load automobile's development direction.

所以采用传动效率高的单级减速驱动桥已成为未来重载汽车的发展方向。

This design has the following merit: What because uses the central single stage deceleration driving axle, causes the entire rear axle of car the structure to be simple, the fabrication technology is simple, thus big reduced the production cost.

本设计具有以下的优点：由于的是采用中央单级减速驱动桥，使得整个后桥的结构简单，制造工艺简单，从而大大的降低了制造成本。

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

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

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。