求翻译：我们认为对于临床确有疗效的中药复方的研究开发，特别是组方药材较多的大复方，自上而下的模式（如图2-2所示）可能会有更高的效率和成功率。是什么意思？

We think that the clinical curative effect of compound Chinese medicine research and development, especially the large compound prescription medicines more, top down model (as shown in Figure 2-2) may have a higher degree of efficiency and success rate.