“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	nuclear magnetometer nuclear magneton nuclear mass nuclear medicine nuclear medicine imaging nuclear membrane nuclear molecule nuclear moment nuclear number nuclear orientation nuclear paramagnetism nuclear physics nuclear pile nuclear plaque nuclear polarization nuclear pore complex nuclear potential nuclear potential energy nuclear potential scattering nuclear power nuclear power plant nuclear propulsion nuclear quadrupole moment nuclear quadrupole resonance nuclear radiation

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