Civil engineering，the oldest of the engineering specialties，is the planning，design，construction, and management of the built environment．This environment includes all structures built according to scientific principles，from irrigation and drainage systems to rocket-launching facilities. 土木工程，最老的工程专业，是建筑环境的规划、设计、施工和管理。这个环境包括从灌溉和排水系统到火箭发射设施的所有根据科学原理建造的结构物。 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、发电站、水系统和污水系统，医院、学校、公共交通系统，以及现代化社会和大量人口集中的地方所必需的其他公共设施。 They also build privately owned facilities such as airports, railroads，pipelines, skyscrapers, and other large structures designed for industrial，commercial, or residential use． 他们也修建私人拥有的设施，如机场、铁路、管线、高楼大厦，和为工业、商业、民用设计的其他大型建筑。 In addition，civil engineers plan，design，and build complete cities and towns，and more recently have been planning and designing space platforms to house self-contained communities． 此外，土木工程师规划、设计和修建整个城市和乡镇，最近已经开始规划和设计空间站以容纳独立的（科研）团体。 The word civil derives from the Latin for citizen． “土木” 这个词是从拉丁语“citizen” 派生而来。 In 1782，Englishman John Smeaton used the term to differentiate his nonmilitary engineering work from that of the military engineers who predominated at the time． 1782 年，英国人 John Smeaton 用这个术语来区分他的非军事工程项目和当时占统治地位的军事工程师的工程项目。 Since then，the term civil engineering has often been used to refer to engineers who build publ...
