文档介绍：Unit 19 Deformation Monitoring of Engineering Structure（工程建筑【Engineering Structure或者工程结构】的变形观测）
Overview（概述【Overview纵览、总的看法】）
Deformation refers to the changes of a deformable body (natural or man-made objects) undergoes in its shapes, dimension and position in space and time domain.（变形指一个形变体【deformable body】（自然或人工物体）在空间和时间范围【domain领域、范围】在形状、尺度和位置上经受【undergo经受、收到】的变化）【变形指一个形变体在空间和时间上经受的形状、尺度和位置的变化】
Due to factors such as changes of ground water level, tidal phenomena, tectonic phenomena, etc, engineering structures (such as dams, bridges, high rise buildings, etc.) are subject to deformation.（由于【Due to】诸如地下水位变化、潮汐现象、地壳构造【tectonic构造的、地壳构造的】现象等等的因素【factor】，工程建筑物（如大坝、桥梁、高层建筑等等）受到变形【deformation】影响【subject受……影响】）
Deformation of engineering structures is often measured in order to ensure that the structure is exhibiting a safe deformation behavior.（工程建筑物的变形经常观测以保证建筑呈现【exhibit展现】安全变形行为）【工程建筑物的变形经常观测以保证建筑物的变形在安全范围内】
Cost is more than offset by savings and by improvements in safety both during and after constructions.（
As a result, the design, execution and analysis of such surveys are a matter of considerable practical importance.（作为结果，这种测量的设计、实施和分析是一件有着相当大【considerable相当大的】的实际【practical实际的】重要性【importance重要性】的事情）
Expanded resource development, the trend towards potentially-deformation-sensitivity engineering and construction projects, and growing geosciencetific interest in