| 单词 | libration |
| 释义 | libration (once / 73412 pages) n WORD FAMILY libration: librations+/librate: librated, librates, librating, libration USAGE EXAMPLESThe position of features in hundreds of Cassini images has allowed the researchers to track these librations. Scientific American(Sep 16, 2015) Apart from these gentle "librations", Mimas otherwise presents the same face to Saturn throughout its orbit. BBC(Oct 16, 2014) They are called libration points, from the Latin word for balance, so we could properly name our new country Libra. Michael Collins, Flying to the Moon: An Astronaut's...(1976) n (astronomy) a real or apparent slow oscillation of a moon or satellite the libration of the moon Hyper variation (astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon) oscillationthe process of oscillating between states |
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