单词	v.o.a.
释义	V.O.A.abbr.① =Voice of America
随便看	perturbation equation perturbation factor perturbation--factor perturbation-free wavelength perturbation, geometrical perturbation-- geometrical perturbation learning perturbation mapping perturbation matrix perturbation method perturbation motion perturbation of spectrum perturbation of the heavenly bodies perturbation of the vertical perturbation, orbit perturbation-- orbit perturbation or mind, perturbation parameter perturbation potential perturbation produced by foils perturbation quantity perturbation radiation perturbations perturbation sample perturbation, shell