查询词典 low-cost

They belong to the low achieving or low performing students and most of them have failure experience in their junior middle schools, they seldom or never taste the pleasure of language learning and often are ignored by teachers, which result in their lower motivation in English learning.

他们属于低成就的学生，而他们中大多数很少或从未品味过成功的喜悦也很少得到教师的关注，这些导致了他们对英语学习不感兴趣。而在这些因素中，教师起着重要的作用。

However, it is difficult to prepare homogeneous mixture for diesel fuel because of its low volatility, high viscosity and low resistance to self-ignition.

在能源、环境和资源的多重压力下，低温燃烧成为研究焦点。

Compared with traditional metal, semimetal and carbon/carbon composite materials, C/SiC exhibits many outstanding advantages like low density, stable coefficient of friction, low wear, large brake ratio and long service life.

与传统的金属、半金属和碳／碳复合材料相比，C／SiC具有密度低、摩擦系数稳定、磨损量小、制动比大和使用寿命长等突出优点，在高速列车、汽车、飞机等领域具有广泛的应用前景。

With famous manufacturers with low-speed universal motor Y series of standards, run smooth, low noise.

配用国内著名厂家生产的低速Y系列标准通用电机，运行平稳、噪音极低。

In this thesis, soft starter equipment realized by thyristors power transform circuit is studied. To improve equipment performance, we apply variable reactance technique to AC motor soft starter study. The high voltage AC working winding of reactance is in series with motor winding, while low voltage control winding and thyristors groupware with intelligent controller constitute close loop circuit. We adopt thyristor phase control voltage-regulator mode to control low voltage winding, then control the reactance of high voltage winding, and then arrive at the goal-control the current and voltage of motor AC to realize motor soft starting.

本文研究由晶闸管功率变换电路实现的软起动器装置，为了提高装置的性能，将可变电抗技术应用于交流电机软起动研究中，电抗器的高压交流工作绕组与电动机绕组串接，低压控制绕组与带智能控制器的晶闸管组件组成闭合回路，采用晶闸管相控方式控制低压绕组，从而控制高压绕组的阻抗，以达到对电机电流与电压的控制，最终实现电机软起动的目的。

It can provide high pressure transportation of high-pressure (0-17MPa), high-efficiency, small involume, low-energy and suitable for low/high temperature, flammability, explosion, strong causticity, including solid granule serosity, etc.

公司系国内第一家专业从事ZG系列多柱塞高压隔膜泵的研究开发，设计制造及销售服务，可为广大用户提供高压力(0-17MPa)、高效率、体积小、低能耗的可适应低/高温，易燃，易爆，强腐蚀，含固体颗粒浆液等的高压输送，并保持无泄漏。

The production of pink shrimp in the Gulf area is still low, despite the better weather and water surface temperature conditions and the reduction of the fishing effort. This low production is expected to continue for several more weeks.

尽管墨西哥湾地区天气、水温条件有所好转，但其红虾产量依然较低；据预测，这种情况将继续维持几个周。

Nickel material is used be our silicide film due to its low electrical resistance and low silicon consumption.

而矽化镍因为拥有低的电阻率和低的矽消耗量被我们用在做为金属矽化物的材料。

On 100t BOF-130t LF of Handan NO.3 steel works,with LF refining technology alone,for heavy desulfurization mission and long refining cyclic,the phenomenon of increasing silicium and carbon is much serious on refining low carbon steel specially the cold-rolling low carbon steel.The results impact the products'final performance and percent of pass.

单独采用LF精炼工艺，脱硫任务重，精炼周期长，冶炼低碳钢，特别是冶炼冷轧低碳钢时，LF炉在脱硫的同时，增硅增碳的现象较严重，影响了产品的最终性能和合格率。

Based on this information and the method of fuzzy identification, fuzzy belonging-functions and equations are derived for the low porosity and low permeability reservoirs of Silurian in the block.

根据毛管压力曲线和相对渗透率的分形几何公式计算孔隙的分维数；以储层测井信息所反应的储层地质特性为基础，利用模糊识别方法，建立了该区块志留系低孔渗储层测井信息的模糊隶属函数和隶属方程；所得隶属度的大小可以用来判断储层的所属类型。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。