| 词汇 | protractor |
| 释义 | protractor noun[ C ] uk /prəˈtræk.tər/ us /prəˈtræk.tɚ/ a device used for measuring and drawing angles. It is usually in the form of half a circle made from transparent plastic with degrees printed on it.量角器；分度规 imagenavi/GettyImages Geometrical & mathematical instruments compass dividers planimeter set square square T-square triangle protractor | American Dictionaryprotractor noun[ C ] us/proʊˈtræk·tər/ a device for measuring and drawing angles, usually shaped in a half circle and marked with degrees Examples of protractorprotractor Using a protractor we were able to make an estimate of the angle of one of the air wedges: 37 (0.645 radians). The angle of flexion of a whole finger with 3 joints was measured with a protractor. The angle between the 2 metal sides was measured with a protractor, estimated accuracy 1x (3 measurements, averaged). This instrument, which was constructed from a precision protractor and sensitive bubble level, was accurate t o within 0.05". By contracting the transverse muscles (and the action of protractor muscles), the foot becomes narrow and elongated causing it to penetrate the substrate. 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 a plumb line. The angle of pulmonary artery bifurcation was measured by a hand-held protractor from the recorded image by extrapolating straight lines along the medial walls of the branch arteries. One ran, as it were, with the protractor alongside, knowing that in many cases the long jump depended on height and not length. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Rulers, protractors and compasses can be taken into the examination. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Dice determined wind speed and direction, and hence the ship's speed and the use of its cannon by measuring angles with the protractor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It combined a compass with a protractor built into the base. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He quantified handwriting by use of a microscope, caliper, pressure board, ruler, protractor and slow-motion pictures. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These data can be computed manually, using special protractors and slide rules with precomputed firing data. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. More commonly the set square bears the markings of a ruler and a half circle protractor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Finally, the initial angle could be measured with a simple protractor. 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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