A stateful bean can only handle requests from a single client until the client releases its hold on that particular bean instance.
有状态bean只能处理来自一个客户机的请求，直到该客户机释放其对那个特殊bean实例的控制。
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。
You'll be referencing this bean within the table rows to get the stock prices, and the bean instance needs to be created before it can be used.
您将在表格中引用这个Bean以获得股票价格，而且在使用Bean实例之前需要先创建它。
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