单词	三板艇
释义	同BOAT
随便看	perts pertubation perturb perturbable perturbably perturbance perturbance--disturbance perturbant perturbate perturbated perturbated flow perturbates perturbating perturbation perturbational perturbation approximation perturbation coefficient perturbation equation perturbation factor perturbation--factor perturbation-free wavelength perturbation, geometrical perturbation-- geometrical perturbation learning perturbation mapping