problem tree

• 问题树

problem tree的用法和样例：

例句

1. The concept, theory, characteristics, analytical steps, model structure of problem tree analysis and the importance in regional development planning were introduced in the paper.
   本文介绍了问题树分析法的概念，理论要点，特点，分析步骤，模型结构及在区域发展研究中的重要性。