covariance methodmethod of concomitant variation共: common; joint; mutual; gener ...变法: political reform变法: [历史] political reform 维新变法 constitutional reform and modernization (1898)共变: [数学] co-variation◇共变函数 [数学] covariant function; 共变矢量 covariant vector; 共变算子 covariant operator; 共变向量 covariant vector; 共变指数 covariant index; 共变种 convariety变法儿: try different ways下载手机词典可随时随地查词查翻译