求翻译：ESDCM共包含322个概念类（隶属于4个大类）、9个基类关系（扩展为35个类关系）、532个类实例，ESDCM中有关产品开发活动的概念类及其实例描述如图3所示，类关系说明如图4所示。是什么意思？

ESDCM contains a total of 322 concept class (under 4 categories), 9 base class relationship (extended to 35 class relations), 532, class instance, ESDCM the concept of product development activities in class and its instances describe as shown in Figure 3, a class description as shown in Figure 4.