You can differentiate between various groups of objects by tagging each group with a certain color rubber band, or a specific number of visible rubber bands.
用不同颜色或者标着特别数字的橡皮筋标记每一组，这样你就可以区分这些不同组的物品。
At first, the events are divided into some groups by primary keys in the business objects.
首先，根据业务对象中的主键将事件划分到一些分组中。
By contrast, a transactional application is continually creating and discarding groups of objects.
相比之下，事务型应用程序不断创建并启用对象组。
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