在前景中

In the process of bromotion of ester, it adopted high selective brominating agent , the yield exceeded 90% and the purity was above 95%.

在芳醚的溴化反应中，首次采用了高选择性的溴化剂，使溴化一步的收率超过90％，含量均在95％以上，具有很好的经济效益和应用前景。

The beginning of 20th century witnessed an impoverished and enfeebled China that slumbered in dim prospects .

在20世纪初期，沉睡在暗淡前景的中国处于贫穷和衰弱的状态中。

The method retrenches PLL circuit,not bound by frequency offset and measures the fundamental current accurately when the network voltage is distorted or asymmetric.A simulation model of voltage source high power active power filter system is found in Matlab/Simulink software.

本文在Matlab/Simulink软件中搭建出系统仿真模型，并与采用单个PWM变流器的有源电力滤波器比较，验证了本文设计的方法能够在较低的器件开关频率下实现较好的补偿效果，具有良好的工业应用前景。

At the beginning,the necessity of taking quantum effect into consideration when studying Diesel cycle is put forward,and the prospects of the cycle application to practical uses are noted.

在分析了研究狄塞尔循环时需要考虑其量子效应的必要性以及该循环在实际社会生产中的广泛应用前景后，首先给出以理想气体为工作物质的狄塞尔循环的效率表达式，然后以理想费米气体为例，根据其状态方程及其热力学性质获得以理想量子气体为工作物质的狄塞尔循环的效率表达式，通过比较得出提高实际热机效率的主要途径。

In mammalian cells, RNAi can be triggered by 21-25 nucleotide duplexes of small interfering RNA.

在哺乳动物细胞里，RNAi可以由21－25个核苷酸长度的小干扰RNA触发，在后基因组时代的基因功能研究和药物开发中具有广阔的应用前景。

In mammalian cells, RNAi can be triggered by 21-25 nucleotide duplexes of small interfering RNA. In the postgenome era, RNAi has broad application prospect in probing gene function and drug research.

在哺乳动物细胞里，RNAi可以由21－25个核苷酸长度的小干扰RNA触发，在后基因组时代的基因功能研究和药物开发中具有广阔的应用前景。

EGIS is made up of Access and DBMS, in which ArcView GIS realizes the function of space data management. It uses Avenue language which is offered by the software itself and programming language-Visual Basic 6.0 to be the system's exploitation language.

论文对该系统的整个设计开发过程、关键技术以及各个功能模块的实现等等都进行了全面而详细地论述，并在最后指出了本系统的不足及今后的改进方向，对GIS在工程地质资料信息化管理中运用的进一步发展和前景也做了展望。

It is expected that the ceramic candle filter has an extensively application. A one-dimensional constant filtration flow model is established. Based on this model, the numerical calculation for the candle filter whose section is cylindrical and conical is carried out.

在高温高压条件下清除含尘气体中的微细尘粒，有效的方法是使用陶瓷过滤器，陶瓷过滤器是最具发展潜力的气固分离装置，除尘效率高达99.9 %，在高温气体净化领域有着广阔的应用前景。

The paper introduces the application of infrared spectroscopy in the process of testing fire-retardant materials.

介绍了红外光谱法在表征阻燃材料与防火涂料结构及研究其阻燃性能方面的应用，讨论了红外光谱分析技术在材料阻燃分析中的应用前景。

Silicon is an important element used in the foundry, in general cast iron, the content of silicon is 1.3%～3.0%. The beneficial effects of t...

由于该原料取自石墨电极厂的废料，因此其成本低廉，并能变废为宝，减少工业垃圾，又因为该原料在铸造冶金过程中，在增加硅的同时也增加了碳的含量，起到双重的作用，因此其应用前景十分广阔。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。