| 单词 | plumb bob |
| 释义 |
plumb bob
英汉-汉英词典
铅锤
词组 | 习惯用语
您要查找的是不是：Plumb bobs 铅锤; 吊线锤; pendulum plumb bob 摆式垂球 gauge plumb bob 量油尺铅锤 Laser Plumb Bob 镭射测锤；激光测锤 plumb bob holder 垂球架 plumb plumb bob plummet 铅锤 setting-out of side plumb bob 边垂线标定 plumb bob [测] 铅锤 brass plumb bob 钢吊线锤
原声例句
万物简史 Something else conjectured by Newton in the Principia was that a plumb bob hung near a mountain would incline very slightly toward the mountain, affected by the mountain's gravitational mass as well as by the Earth's. 牛顿在《原理》中作的另一个推测是：一根挂在大山附近的铅锤线，会受到大山和地球引力质量的影响，稍稍向着大山倾斜。
英语百科
Plumb bob   A plumb bob or a plummet is a weight, usually with a pointed tip on the bottom, that is suspended from a string and used as a vertical reference line, or plumb-line. It is essentially the vertical equivalent of a "water level". The instrument has been used since at least the time of ancient Egypt to ensure that constructions are "plumb", or vertical. It is also used in surveying to establish the nadir with respect to gravity of a point in space. They are used with a variety of instruments (including levels, theodolites, and steel tapes) to set the instrument exactly over a fixed survey marker, or to transcribe positions onto the ground for placing a marker.
近义、反义、联想词
近义词n.bob
英英词典
plumb bob n.
synonymous： plumb, plummet |
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