plumb line

音标发音

For me these meditations are like a plumb line dropped by a master builder — to see if the walls are straight or crooked.
對我來說這些冥想就像一條建築工人吊的鉛垂線 — 來檢查牆壁是否垂直。
This article gives an easy way in which laser plumb line is set up by means of He-Ne laser in space with the liquid level as the base.
本文敘述以液麪爲基準麪，用小型氦-氖激光器在空間建立激光垂直線的簡易方法。
Total lumbar lordosis, thoracic kyphosis, sacral slope, and C7 plumb line were measured on the pre- and postoperative whole spine lateral views.
在術前、後全脊柱側位片測量腰椎縂前凸、胸椎縂後凸、骶骨傾斜度和頸7鉛垂線。

Ben Kingsley, now sixty, is in great shape—his carriage is so erect that you could drop a plumb line from the back of his bald crown to his heel.
NEWYORKER: House of Sand and Fog

a piece of string with a weight attached to one end, used either to test if something vertical, such as a wall, is exactly straight, or to find the depth of water

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.