recursionn.循环；[数]递归recursion programming递归程序设计recursion weighted LS递归加权最小二乘法recursion formulation递推公式recursion instruction递归指令recursion_interconvert递归互换法recursion and iteration递归与迭代recursion number sequence递推数列recursion sequence method递推序列法Recursion Order Hierarchy大豆病害Recursion in text structure语篇结构中的递归现象