介质

The speed of propagation for mechanical waves, the speed of sound , is defined by the mechanical properties of the medium.

速度传播的机械波，音速，是由机械性能的介质。

The extent of the decrease is influenced by the type of corrosion medium.

选用2种双相不锈钢在1200℃固溶后，760℃分别时效不同时间，研究其相结构、硬度与在几种典型腐蚀介质中的电化学腐蚀行为。

Actuator is automatic control system, the operation is based on the role of control signal controller is operated by the size of the medium change, you will be charged variable required on maintaining.

执行器是自动控制系统中的操作环节，其作用是根据控制器送来的控制信号改变所操作介质的大小，将被控变量维持在所要求的数值上。

And the measuring error brought by the IR drop of the medium resistance is eliminated further.

有效地解决了线性极化技术因估算塔菲尔系数所带来的理论误差，进一步消除了因介质电阻IR降的影响产生的测量误差。

The first gate for the air by-way must have the following parameters: dimension is Ду 80-100, temperature upon working condition is not less then 350 centigrade degree, pressure medium is 0,3 MPa.

气体旁通的第一闸须满足下列参数：直径为80—100，工作条件下的温度不低于350摄氏度，介质压力为0.3MPa（合3.059公斤/每平方厘米）。

The second gate for exhaust gases by-way on a diesel engine must have the following parameters: dimension is Ду 60-80, working temperature is up to 650 centigrade degree , pressure medium is 0,3 MPa.

在柴油机上排出气体旁通的第二闸应达到下列参数：直径为60—80，工作温度650摄氏度，介质压力0.3MPa（合3.059公斤/每平方厘米）。

In this paper we combining connecting tunnel project of Subway Line 4 at Xidan-lingjing bystreet in Beijing. To aim at the difficulties of building large-span connecting tunnels in the fine sand layer, through roads and underground pipelines, construction nearby buildings and other project difficulties. Using theoretical analysis, numerical simulation, field tests and other research methods to comprehensive and systemic research the stratum deformation mechanism and process control techniques of shallow excavation method, and a series of results were obtained. Firstly, use the stochastic media theory to analyze the stratum deformation mechanism, concretely analyze the analytic equation of surface horizontal displacement and deformation which were caused by the excavation of single-hole and double-hole tunnel, and further discussion on ground settlement, vertical deformation, surface horizontal displacement and horizontal deformation. Analyzing the main influence factors of surface displacement, and combined with practical work to proof the theory which was applied to shallow buried single-hole tunnel in fine sand layer was scientific.

本文结合北京地铁四号线西单～灵境胡同渡线隧道工程，针对在粉细砂地层中修建大跨渡线隧道，下穿道路和地下管线，临近建筑物施工等工程难点，利用理论分析、数值模拟、和现场监测等多种研究手段，对浅埋暗挖隧道地层变位机理及控制技术，深入地进行全面和系统的研究，并取得以下成果：(1)引入随机介质理论，对地层变位机理进行了分析，具体分析了单、双孔隧道开挖引起的地表位移及变形的解析方程，并深入探讨了地表沉降、垂直变形、地表水平位移和水平变形的特点，同时分析了影响地表位移的主要因素，并结合工程实例，佐证该理论应用于粉细砂地层浅埋暗挖单孔地铁隧道的科学性。

Calcareous sand is a special marine geotechnical medium,which has unexpected physical and mechanical property due to its origin and fabric.

钙质砂是分布于热带海洋中的一种特殊岩土介质，由于成因和组构上的特点导致其物理力学性质与常规的陆源砂有所区别。

The effects of the pretreatment process were indicated with gold extraction by cyanidation of the water washed calcine after microwave irradiation.

物料在一定频率微波场中的升温过程与物料本身的比热、密度、损耗因子等物理性质、物料的化学反应热和周围介质的温度以及微波场的电场强度等因素有关。

Microwave irradiation as a spread medium and calefaction energy sources is widely applied in all fields of science.

微波技术作为一种传播介质和加热能源已被广泛应用于各个科学领域。

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。