survey of existing line；survey of existing railway  既有线测量

Abundant existing species  主要存在形式

access existing permanent file  存取现存永久档案

according to existing law  根据现行法律

account the existing infrastructure  基建往来账

add existing item  加入现有项目

add existing project  加入现有项目

adding extra-floor spanning existing building with steel structure  钢结构跃层加层

adding extra-floors spanning existing building  跃层加层

Adding storeys around existing buildings  套建增层

additions to existing product lines  冷热电三联供系统（CCHP）; 冷热电联供系统; 热电冷联产(CCHP); 现有产品线的增加

Adjacent to Existing Line  临近既有线

advantages and existing problems  优势和存在问题

already existing flaw  固有裂缝; 固有缺陷

Already-existing Depletion Region  既有空区

analysis of existing circumstance  现状分析

analysis of existing condition  分析现状

append to existing  附加到现存

application of the existing facilities  利旧设施