“secular variation”的概念、定义、翻译、参考文献-科学参考

单词	secular variation
释义	secular variation [`sek·yǝ·lǝr ´ver·ē`ā·shǝn] ^ASTRONOMY A perturbation of the moon's motion caused by variations in the effect of the sun's gravitational attraction on the earth and moon as their relative distances from the sun vary during the synodic month. ^GEOPHYSICS The changes, measured in hundreds of years, in the magnetic field of the earth. Also known as geomagnetic secular variation.
随便看	retrograde amnesia retrograde condensation retrograde evaporation retrograde gas-condensate reservoir retrograde metamorphism retrograde motion retrograde orbit retrograde reservoir retrograde wave retrograding shoreline retrogression retrogressive metamorphism retrolental fibroplasia retroposon retroreflection retroreflector retrorocket retrorse retrostalsis retrosynthetic analysis retroussage retroversion retrovirus retry retting

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