节点层 meaning in English

node level

This study builds the tree structure of indicators that can easily get the finial index at root node through the leaf nodes , also can down the leaf nodes to find the limitation factors from root node . hence the tree of multi - indicators improves the ability of explanation and synthesis
本研究通过构建多指标结构树，通过不同层次叶子节点层层聚合得到最后可持续发展指数，同时从根节点的评价结果逐级回溯叶结点上的评价因素或指数，解释可能的限制或影响因素，提高了多指标体系的解释能力和综合能力。