专业外语土木工程专业(路桥方向)汉译英

专业外语土木工程专业(路桥方向)汉译英 Lesson 7 1.发货人和旅行者根据所提供的服务水平选择交通运输方式。 The shippers and travelers select transportation modes in terms of level of service provided. 2.术语服务水平是用来表述道路为交通服务的质量。 The term level of service is used to describe the quality of service that is provided for the traffic by the roads. 3.因为时间紧迫,他们选择用航空方式运输这些紧急物资。 They selected air transportation to carry these important goods since time was a premium. 4.公路运输具有机动灵活并能提供门到门服务的特点。 Highway transportation has the advantages of flexibility and ability to provide door-to-door service. 5.我国公路运输网的主要骨架是由12条限制出入的高速公路组成。 The backbone of highway transportation network comprises of 12 limited-access freeways in our country. Lesson 8 1.公路定线包括现有资料的室内研究、路线踏勘测量、初步定线和最终定线四个阶段。 The highway location involves four phrases: office study of existing information, reconnaissance survey of routes, preliminary location and final location. 2.一个独一无二的桥位或者一座山的垭口都可能成为一个主要的控制点。 A unique bridge site or a mountain pass also may become a primary control point. 3.一般采用效益成本比法评价可能路线的经济可行性和环境可行性。 The benefit-cost ratio method is used for evaluating the economic and environmental feasibility of the alternative routes. 4.近来,计算机技术的应用极大地提高了公路定线的效率,从而使得到最佳线路成为可能。 Recently, application of computer techniques has significantly enhanced the efficiency of the highway location, resulting in possibility of best alignment. 5.踏勘测量的主要任务是在路线带内确定几条可行的线路,并把它绘在地形图上。 The primary object of reconnaissance survey is to identify several feasible routes with a band, then plotting on photographic maps. Lesson 9 1.设置缓和曲线的主要目的是避免线性由半径无穷大的直线突然变化到半径为一定的 曲线。 The primary object of a transition curve is to avoid a sudden change from a tangent with infinite radius to a curve of finite radius. 2.平面线形的竖向线形在初步设计阶段就必须一起考虑,不能分别考虑。 At the stages of preliminary design the horizontal and vertical alignment must be considered together, not separately. 3.最大纵坡的选择取决于设计车速和设计车辆,最小纵坡则取决于公路的排水状况。 The selection of maximum grade for a highway depends on design speed and design vehicle, and that of minimum grade depends on the drainage conditions of the highway. 4.建在有适当路拱、坚实的地基上的高级路面,最小纵坡可以减小到0.3%。 Minimum grade maybe reduced to 0.3 percent on high-type pavement constructed on suitably crowned, firm ground. 5.反向曲线间最好设置一段足够长的直线,以利于超高的过渡。 A sufficient length of tangent had better be placed between the reverse curves to facilitate the transition of superelevation. Lesson 10 1.在立交中,车辆通过匝道来转换行驶方向。 The vehicles in interchange may transfer their movement direction by the use of ramps. 2.城市平面交叉口通常需要采用信号控制来组织交通及减少事故。 In urban areas, the intersections at grade generally require signalized control to organize the vehicles and decrease in accidents. 3.设计菱形立交匝道时,必须注意避免错路运行。 Wrong-way movements must be taken care of in the design of the ramps of diamond interchange. 4.可以采用集散道路解决苜蓿式立交中存在的交织运行。 Using collector-distributor roads can overcome weaving movements of the cloverleaf interchange. 5.定向式立交中,左进和左出高速公路容易产生交通事故。 Entering freeway from the left and exiting it to the left can easily cause traffic accidents.