查询词典 headwater erosion

It is thought that high difinition CT scan not only accurately showed the position of cholesteatoma,but also the degree of bone erosion,and can early predict the develpment of otogenic complications,demonstrate non-typical extensive temporalbone erosion.

认为高分辨率CT不仅能将胆脂瘤精确定位，而且还能显示周围骨质的破坏程度，能早期预测颅内并发症的发展，确定不典型的广泛破坏性病变。

Results positive findings of MRI in shoulder joint as follow, synovitis and enhanced bilateral pannus (93.5%), bone erosion (77.9%), cartilage erosion (90.3%),change of synovium and bone marrow was taken as diagnostic standard, the sensitivity, specificity, accuracy, 69.0%、76.7%、72.3%.

分析病变早期E-MRI特征。结果肩RA MRI阳性表现，滑膜增生血管翳形成(93.5%)，骨侵蚀(77.9%)，软骨侵蚀(90.3%)等，以滑膜和骨髓改变诊断肩RA，其敏感性、特异性、正确率分别为： 69.0%、76.7%、72.3%。

According to the principles of synthesis, dominance, regionality and relative consistency, the environment degradation evaluation system is divided into three classes: vulnerable region, vulnerable type and vulnerable cell. The research area belongs to the erosion degraded Southern Red Hilly Area region. Based on the conceptions and grading, the dissertation probes into the methodology of evaluation and case study, and establishes a potential degradation evaluation system which comprises altitude, gradient, soil erosion index K, annual rainfall, the proportion of rainfall in raining period, and the drought index of rainless period.

在脆弱性概念及其分类的基础上，本文进行了脆弱性评估的方法探讨和实证研究，在脆弱性分析的基础上，选择高度、坡度、土壤可蚀性K值、降雨量、暴雨量、多雨期降雨比重和少雨期干旱指数为潜在脆弱度指标；选取作为区域人地关系、社会经济发展与管理水平综合影响结果的人类活动指标森林覆盖率和坡耕地指数作为现实脆弱度评估的人为加速侵蚀的修正指标，计算生态环境的现实脆弱度，并将其指标体系与方法用于衡阳盆地生态环境脆弱度评估的实证研究。

The carrying capacity of water resources and water environment in Yellow River basin is faced with a huge challenge, such as vegetation destruction, water and soil erosion, riverbed run-up, watercourse shrinkage, water shortage, frequency breakage flow, severity pollution, water quality deterioration, trace to the source and sendiment, coast erosion and regradation.

植被破坏、水土流失，河床抬高、河道萎缩，水源匮乏、频繁断流，污染严重、水质下降，朔源淤积、海岸蚀退等表明黄河流域水资源与水环境的承载能力面临着极大的挑战。

Rubber powder could improve salification erosion resistance, and the more rubber powder, the better salification erosion resistence was. But the effect of rubber powder particle diameter was not obvious.

橡胶粉的掺入提高了水泥土的抗盐蚀能力，且橡胶粉掺量越高，抗盐蚀能力越强，但橡胶粉粒径的影响则不显著。

The surface topograph of the coatings specimen after erosion was observed under the scanning electron microscopy and the erosion mechanisms was discussed.

对冲蚀后的涂层试样表面形貌进行了扫描电子显微镜观察分析，就石英砂颗粒和催化剂颗粒冲蚀下，叶片涂层失重破坏的机理进行了分析探讨。

Because change of volume reflected eroding process of watershed and surface change reflected change of topography surface, this model described relationship between watershed topograph and erosion.iv As a quantitative index of wateshed topography, topograph fractal demension can represent surface shape information of watershed topography in the round. Reseach find that watershed model and actual watershed show good fractal character. Topography fractal dimension related with process of development of watershed physiognomy and represented degree of watershed development, v Sediment yield intensity of watershed model reflected erosion characteristic of watershed model in different development phase.

流域模型产沙强度的变化反映了流域模型在不同发育阶段的侵蚀特征，模拟试验研究结果表明：在整个流域模型地貌地貌的发育过程中，其产沙强度呈现由小到大，然后又逐渐减小的总体趋势，流域模型单位降雨产沙率及平均输沙率与地形分维数表现为Gaussian模型关系，其关系形式与结论3中相对体积和表面积之间关系相似，进一步说明了以地形分维数表达地形变化的合理性。

Large scale CFB boiler baker is a key process to make anti-erosion refractory s intering, shaping and attain its performance of heat resistance, pressure resist ance, erosion resistance, torsibility and shock-proof.

大型循环流化床锅炉的烘炉是使耐火耐磨材料烧结成型并使之达到耐火、耐磨、耐压、抗折、热震稳定性、高温耐压性能的关键。

The unstructural knowledgeof soil erosion in Guizhou Province was concluded,which is the basis of studying the primaryand the senior methods of interpreting soil erosion message in Guiozhou based onunstructural knowledge.

搜集、分析了贵州省有代表性的17个小流域土壤侵蚀和土壤侵蚀影响因子的相互关系，总结出了贵州山区土壤侵蚀的非结构性知识，为进行基于非结构性知识发现的土壤侵蚀信息提取初级和高级方式研究奠定了知识基础。

This research applied austempering heat treatment to obtain various microstructures in the matrix of ductile iron and studied their erosion wear behavior. The effects of different impact angle and microstructure on erosion wear rate and morphology wase investigated. Mechanical property evaluation together with SEM analysis was also carried out to correlate the wear behavior observed.

本研究系以球墨铸铁进行沃斯回火热处理，获得不同基地组织的试片，再利用冲蚀磨耗实验来进行各种角度的冲蚀磨耗，配合机械性质测试及扫描式电子显微镜来观察冲蚀表面，探讨沃斯回火热处理对球墨铸铁不同冲蚀磨耗型态与冲击角度的影响。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？