单级的

The mean of measurement error of wide band sound level trends to 3 dB for single hydrophone and to 0 dB for vertical array measurement.

海上实验测量单频信号声源级的结果与数值计算的起伏一致，海试中垂直阵获得较高的空间增益。

When heterotrophic bacteria were washed out while autotrophic bacteria were accumulated, the sludge mainly was bacilliform floccule, but the sludge was petallike when the steady nitrification was set up and part nitrogen removal function was reached. The lack of organic carbon source made autotrophic bacterium become the dominates and the microbial community structures become simple.

经过成功启动并稳定运行后，单级自养脱氮系统内随着反应器内有机碳源的减少，系统中自养细菌在同异养细菌的竞争中逐渐占据优势地位，适应能力较弱或对有机碳源量要求较高的异养细菌则被大量淘汰，微生物群落结构与接种污泥相比已变得简单且较稳定，种群多样性降低。

Use of quality multigrade oils (eg Rimula X 15W-40) will provide 2-3% reductions in fuel consumption compared to monograde oils.

与单级润滑油相比，使用高质量的多级通用润滑油比如劲霸(Rimula X 15W-40可以降低 2-3%的燃油消耗。

At 100 C SAE 15W-40 and SAE 40 oils will have similar viscosity - BUT above 100C the multigrade oil will remain thick er than the SAE 40 providing even better protection than the monograde oil.

在100摄氏度下，SAE 15W-40和SAE 40润滑油具有类似的粘度–但是在100摄氏度以上，多级润滑油会比SAE 40更稠厚，从而能够提供比单级润滑油更好的保护功能。

The present invention relates to a reduction box mainly composed of coaxial line input shaft, output shaft, internal ring gear, eccentric toothed plate engaged with the internal ring gear and pin shaft.

本发明涉及一种同轴输入输出单级齿轮差齿减速箱，该减速箱主要由同轴线的输入轴1、输出轴7、内齿圈6，与内齿圈6啮合的偏心齿片5、销轴3等构成。

Finally, the numerical investigation of shock wave compression passage and the analysis of flow characteristics are performed and it is concluded that the pressure ratio of single stage may be equal to nine.

最后，通过对激波压缩通道进行了流场数值模拟，对其流道内的气动特性进行了分析，得出其单级压比可以达到9，充分显示出其优越的高压比特性。

SOW series single stage double entry pump is a horizontally split volute centrifugal pump, mainly used to handle clean water or liquids similar to water in physical and chemical properties, temperature not above 105℃.

SOW系列单级双吸泵系水平中开蜗壳式离心泵，主要供输送温度不高于105℃的清水或理化性质类似于水的液体。

Because there is less gas pressure exerted on the valve stem.

在单级减压阀里，输出压力随钢瓶压力的减小而增大，这是因为施加在阀门系统上的气体压力减

The stage can be either a traditional coupled-line or a three-line structure.

此单级电路可为一个传统的耦合微带线或是一个三线的架构。

With the use of RNG turbulent model in the CFD software Fluent, the inner flow of double suction centrifugal pump with semi-spiral suction chamber was calculated.

在CFD软件Fluent中采用考虑了旋转与曲率影响的RNG湍流模型，对具有半螺旋形吸水室的单级双吸离心泵进行了全流道数值模拟计算。

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。