二: two阶: steps; stairs二阶的: divalent二阶段: two-stage二阶法: second-order method二阶基: divalent radical二阶矩: second moment; secondary moment; secondarymoment二阶铃: second order fluid二阶酸: diatomic acid; dihydric acid二阶堂: nikaido第二阶段: second stage; subordinate phase二阶标架: frame of order two二阶参量: two-stage parametric二阶差别图: second-order difference picture二阶差分: second difference; second order difference二阶程序法: second-order schedule procedure二阶弹性: second order elasticity二阶导数: second derivative; second-order derivative二阶电矩: second order electric moment二阶电路: second-order circuit二阶段测试: second stage testing二阶段法: two phase method二阶段生长: diauxie二阶段提交: two-phase commitment二阶段选择: two-stage selection