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A brief introduction of the representative assessment standards for river health overseas is given, and then the measures and key points of physical-chemical assessment, habitat assessment, hydrological assessment and bio-assessment are reviewed respectiv
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文中简要介绍了国外河流健康评估具有代表性的技术标准，对于物理－化学评估、生物栖息地评估、水文评估、生物评估的方法和要点分别作了评述。 |
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A brief introduction to 2005 Addenda of ASME Boiler and Pressure Vessel Code, Section I. Leaning some important changes in it and comparing with the relevant provisions in China Standard.
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对ASME锅炉及压力容器规范第I卷2005增补作简要介绍，对其中重要的修改进行学习，并与我国标准中的相应条文进行比较。 |
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A brief introduction to domestic research of negative refracting materials is given, and two possible routes to negative refracting via functional polymeric materials are suggested.
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本文还简要介绍了国内负折射材料的研究现状，提出了利用高分子功能材料实现负折射的两种可能的途径。 |
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A brief introduction to the University.
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该大学的一个简短的介绍。 |
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A brief introduction to the X-ray crystallographic studies on RNA polymerase Ⅱ complexes and the enzymatic mechanisms revealed by the crystal structures.
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摘要用X射线晶体学方法测定的一系列RNA聚合酶Ⅱ复合物结构揭示了真核转录的分子机制。 |
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A brief introduction was given to the concept of natural tracer method, the characteristics of temperature and conductance distribution in groundwater, and the theory of heat-source method and conductance method for leakage detection.
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摘要简述天然示踪法的概念、地下水温度场和电导场分布特征、热源法原理及电导渗漏测试原理。 |
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A brief melodic or harmonic unit often constituting the base for a larger phrase or structure.
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音型一组短而连贯的音符或和弦构成的基本音型，经常为一更大的乐曲或结构构成基础 |
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A brief rehearsal, as of a play or role, performed usually in an early stage of production.
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排练常在戏剧制作早期进行的短暂的排练，如关于某剧或某角色的排练 |
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A brief review of these materials and techniques indicates that manufacturers can select from a wide variety of stencil types to meet specific application needs.
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粗略回顾一下这些物料和技术，可以看出，制造商可以选择多种多样的钢网类型来满足特殊的应用要求。 |
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A brief review on the updating methods is given in the paper.
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摘要本文简要介绍和归纳了五种常用的动态模型修正方法。 |
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A brief shot that interrupts the visual continuity of the main action of a film, often to depict related matter or supposedly concurrent action.
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切换镜头一种中断电影的主要情节画面的连续性的简短镜头，通常用来描绘相关事件或可能同时发生的情节 |
