同义词： plumb line perpendicular
以上来源于: WordNet
N-COUNT A plumb line is a piece of string with a weight attached to the end that is used to check that something such as a wall is vertical or that it slopes at the correct angle. 铅垂线
The paper outlines the cause of anomalous local plumb-line variations before earthquakes; the establishment of monitoring networks; the progress and prospect of research.
本文概述了地方铅垂线变化震前异常的原因、监测网的建立、研究进展以及展望。
This paper introduces the main restoring treatment plan, technical request and construction process after the plumb-line of dam safety monitoring system was broken in Feilaixia Hydro Project.
文中介绍了飞来峡大坝安全监测系统倒垂线断裂后主要的修复处理方案、技术要求和施工过程，为水利工程中类似问题提供参考。
For me these meditations are like a plumb line dropped by a master builder - to see if the walls are straight or crooked.
对我来说这些冥想就像一条建筑工人吊的铅垂线—来检查墙壁是否垂直。
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