| 单词 | plumb line |
| 释义 | plumb line noun[C] uk/ˈplʌm ˌlaɪn/us/ˈplʌm ˌlaɪn/apieceofstringwith aweightattachedto one end, used either totestif somethingvertical, such as awall, isexactlystraight, or tofindthedepthofwater （测垂直面或水深的）铅垂线，重锤线 flubydust/iStock/Getty Images Plus/GettyImages Measuring, weighing, & counting devices
Examplesofplumb lineplumb line The angle of inclination relative to the horizontal of the petiole, lamina and drip tip of each leaf was measured using a transparent plastic protractor and aplumbline. From theCambridge English Corpus It involved the use of a bar with aplumbline, attached to a wooden handle. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.It is derived by deducting normal heights from the normalplumbline. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.A section of the scaffolding would hold aplumblinethat was centered over a datum mark on the floor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Apparently if aplumblineis dropped from the north side of the tower it would fall 3 feet away from the building. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.It even gave instructions on how to obtain measurements using theplumbline. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The outer casing of the gyrocompass device is held in such a way that it remains aligned with the localplumbline. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Aplumblinedropped from the tower revealed that the concrete block had settled during the storm, giving the lighthouse a pronounced shoreward list. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Each cross piece had aplumblinehanging vertically at each end. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The astrologer's instruments ("horologium" and "palm") are aplumblineand sighting instrument. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.As the building proceeded upwards theplumblinewould also be taken higher, still centered on the datum. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.It was furnished with aplumblineand a double chord for making angular measurements and bore a perforated pointer. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.There were instances of bricks, plumb lines and so on being thrown from bridges, and of tankers being forced on to the hard shoulder. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under theOpen Parliament Licence v3.0 The force of gravity acts everywhere perpendicular to the geoid, meaning that plumb lines point perpendicular and water levels parallel to the geoid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.If the notches corresponding to the plumb lines matched on both sides, it showed that the beam was level. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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