四: four阶: steps; stairs矩: carpenter's square; square r ...量: measure capacity二阶矩量: second moment高阶矩量: high-order moment三阶矩量: third moment一阶矩量: first moment矩量: moment matrix四阶: quadravalence矩量法: method of moments; moment method; moment of method; moments methodk阶矩: k th moment二阶矩: second moment; secondary moment; secondarymoment阶矩阵: n-matrix零阶矩: zeroth moment三阶矩: third moment一阶矩: first moment大积矩量: major product moment矩量矩阵: moment amatrix; moment matrix矩量母函数: moment generating function; moment-generating function矩量问题: moment problem第四阶段: phase four - programme suspension四阶段提交: four-phase commitment四阶方程: fourth-order equation四阶魔方: rubik's revenge
