plumb line
英 [plʌm lain] 美 [plʌm laɪn]

n.

铅垂线；

变形

复数：plumb lines

英英释义

plumb line

• n.a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point

  同义词：perpendicular

双语例句

用作名词(n.)

1. The plumB line is always perpendicular to the horizontal plane.
   铅垂线总是垂直于水平面的。

权威例句

Plumb-line.
Plumb Line
Plumbline
A Simple But Effective Improvement to the
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