Once you are sure that all the existing instances have been unpickled, updated, and re-pickled, you can remove the old class definition from the source code module.
一旦确定所有现有的实例都已经unpickle、更新和重新pickle后，可以从源代码模块中除去旧的类定义。
This session bean will be used by an ActionServlet in PBudgetWeb module to interact with PBUser entity bean to manage the user instance and its related entity bean instances.
该会话Bean将由PBudget Web模块中的一个ActionServlet用于同pbuser实体Bean进行交互，以管理用户实例及其相关实体Bean的实例。
But there are some instances where what you want to do is so minor that you don't want to build a whole module for it.
但有些情况下，你想做的是那么轻微，你不想为它构建一个整体模块。
But there are some instances where what you want to do is so minor that you don't want to build a whole module for it.
但有些情况下，你想做的是那么轻微，你不想为它构建一个整体模块。
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