句子

1.预应力混凝土是不是一个新概念，可以追溯到1872，当p.h.jackson，一名来自加利福尼亚的工程师，专利系统，采用预应力拉杆从单个块构造梁或拱。

Pretressed concrete is not a new concept, dating back to 1872, when P.H.Jackson, an engineer from California, patented a pretressing system that used a tie rod to construct beams or arches from individual blocks.2. 钢在工程中被广泛应用，其性能非常适合于建设的目的。

Steel is widely used in engineering, for its properties are most suitable for construction purpose.3．这是因为由弯矩产生的拉力是在加固过程中创建的债券抵制。

This is because the tensile forces resulting from the bending moments are resisted by the bond created in the reinforcement process.4.第一，养护措施应选择能延长道路寿命和良好的路面。

First, curing measures should be selected which will give long road life and good road surface.5.在可能的范围内，基础混凝土浇筑保持基坑干燥的。

To the extent possible, the foundation concrete is placed keeping the excavation dry.6.尽可能的，结构施工图应按比例绘制。

As far as possible, the structural working drawings should be drawn to scale.7.脱水成为一个主要的操作当基坑处于自然水面以下和拦截地下水流。

Dewatering becomes a major operation when the excavation lies below the natural water table and intercepts the groundwater flow.8.在桥梁建筑材料的选择基本上是钢或混凝土之间，而混凝土的主要缺点是抗拉强度很小。

The choice of material in construction of bridges is basically between steel or concrete, and the main trouble with concrete is that its tensile strength is very small.9.我们进行了很长一段时间从空中调查早期。

We have progressed a long way from the early days of aerial surveys.10.排水板似乎更好，更快和更便宜的。

Wick drains appear to be better,faster and cheaper.11.厚层施工会导致更好的保温和增加有效压实时间为情感。

Construction in thicker layers would lead to better heat retention and increase the time available for affective compaction.12.一是建立柔性路面的路基，底座，底座和磨损表面。

A flexible pavement is build up of the subgrade, the subbase,the base and the wearing surface.13.一束已经由一个大的瞬间破裂，它永远不可能回到原来的原状态。

Once a beam has been cracked by a large moment, it can never return to its original uncracked state.14.石砌圬工桥梁本性坚强，只需要很少的维护。

Stone masonry bridges are by nature strong and require very little maintenance.15.当粘土和过量的水，它可以像液体一样流动。

When clay soil is mixed with an excessive amount of water, it may flow like liquid.16.两体到目前为止分开的，它们之间的引力可以忽略不计。

The two bodies are so far apart that the attractive force between them is negligible.17.这种通信系统的主要特点是操作简单，便于维修。

This communication system is chiefly characterized by its simplicity of operation and the ease with which it can be maintained.18.It is our great pleasure to note that our highway net is being perfected.我们很高兴地看到，我国公路网的完善。

19.Civil engineering is the planning，design，construction，and management of the built environment。

土木工程的规划，设计，建设，并建成环境的管理。

20.This environment includes all structures built according to scientific principles，from irrigation and drainage systems to rocket launching facilities.这个环境包括依据科学原理建造的所有结构，从灌溉和排水系统到火箭发射设施。

21.Civil engineers build roads, bridges, tunnels, dams, harbors , power plants, water and sewage systems, hospitals, schools, mass transit, and other public facilities essential to modern society and large population concentrations.土木工程师修建道路，桥梁，隧道，大坝，港口，电厂，水和污水处理系统，医院，学校，大众运输，和其他公共设施的现代化社会和大量人口集中的关键。

22.They also build privately owned facilities such as airport, railroads, pipelines, skyscrapers, and other large structures designed for industrial, commercial or residential use.他们还建立私人拥有的设施，如机场，铁路，管道，摩天大楼，和其他大型结构设计为工业，商业或住宅用途。

23.In addition, civil engineers plan, design, and build complete cities and towns, and more recently have been planning and designing space platforms to self-contained communities.此外，土木工程师规划，设计，建设完整的城市和乡镇，近年来已经在规划和设计空间的平台独立的社区。

24.The word civil derives from the Latin for citizen. In 1782, Englishman John Seaton used the term to differentiate his nonmilitary engineering work from that of the military engineers who predominated at the time.土木这个词来源于拉丁文。

1782，英国人约翰Seaton使用术语来区分他的非军事工程工作从军事工程师谁占主导地位的时候。

25.Since then, the term civil engineer has often been used to refer to engineers who build public facilities, although the field is much broader.从那时起，土木工程师这一术语通常用来指建设公共设施的工程师，尽管这一领域非常广阔。

26. Because it is so broad，civil engineering is subdivided into a number of technical specialties.Depending on the type of project, the skills of many kinds of civil engineer specialists may be needed.因为它是如此广泛，土木工程被细分为许多技术专业。

根据项目的类型，许多土木工程师所需要的技能。

27.when a project begins, the site is surveyed and mapped by civil engineers who experiment to determine if the earth can bear the weight of the project.当一个项目开始，该网站的调查和土木工程师试验以确定该土是否能承担项目的重映射28.Environmental specialists study the project’s impact on local area，the potential for air and groundwater pollution，the project’s impact on local animal and plant life，and how the project can be designed to meet government require－ments aimed at protecting the environment.环境专家研究工程对当地的影响，潜在的空气和地下水污染，该项目对当地动植物的影响，以及如何在项目的设计，以满足政府的需要－旨在保护环境的要求。