| 词汇 | precession |
| 释义 | precession noun[ U ] physics specializeduk /prɪˈseʃ.ən/ us /prɪˈseʃ.ən/ the slow and continuous change in the rotation (= movement around a fixed point) of a planet, star, etc. that is spinning around another planet, star, etc.（行星的）进动 Astronomy albedo Andromeda Aquarius Aries asteroid galactic galaxy Gemini geostationary geosynchronous nova observatory orbit orbital Orion substellar sunspot supergiant supermassive supermoon Examples of precessionprecession Precession rates from 0 to 80rev/min were attainable, measured by timing several revolutions of the table. Experiments were performed for precession rates spanning the range of validity of the theory. Secondary motion is imposed upon the primary rotation of the liquid by the relative precession of the top. A fluid contained in a rotating cylinder has an inertial mode which is excited by forced precession of the container. Although this age for the paleolakes is geologically recent, several thousand obliquity cycles and 104 climatic precession cycles have passed since then. This section investigates the main planetary system properties that control orbital precession rates. This situation obviously changes during the course of a climatic precession cycle and there are repeatedly epochs during which the southern hemisphere becomes more clement. The model to be described here predicts the temporal evolution of the annual maximum surface temperature at all grid points through one recent precession cycle. The reason for this result was assumed to be the global elevation difference, which is sufficient to keep the global circulation pattern invariant with respect to the precession cycle. Fig. 7 shows the model results for three representative epochs within a precession cycle. A numerical simulation of the variation of the annual maximum surface temperature and soil water content near the surface has been carried out for the last climatic precession cycle. Apart from some minor incidents and inconvenience to traffic, this self-disciplined precession gave the police no real cause for concern. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 About 5,000 years ago the ancient astronomers were able to do remarkably detailed numerical calculations from which, for example, they evaulated the precession of the equinoxes. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Because of precession, the positions of the constellations slowly change over time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Gyro stabilizers consist of a spinning flywheel and gyroscopic precession that imposes boat-righting torque on the hull structure. 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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