单词	堅力
释义	同Festigkeit
随便看	covariance stationarity covariance stationary process covariance transformation covariant covariant base vectors covariant component covariant curve covariant derivative covariant differential covariant differentiation covariant equation covariant functor covariant index covariant of curve covariant perturbation covariant spinor covariant system covariant tensor covariant theory covariant vector covariant vector field covariate covariation covariation analysis covariation-- correlation