To add a new row to your table, you simply create an instance of your entity class, set the attributes, and tell the EntityManager to persist the new entity.
为了向您的表格添加一个新行，您只需创建一个实体类的实例，设置其属性，并更新类entitymanager以支持新实体。
It's just important that the ShoppingListManager class does something to persist the user's shopping list item.
重要的是，ShoppingListManager类做了一些事情来持久化用户的购物清单中的商品。
The EntityManager class is used to retrieve, persist, update, and delete entities.
类 EntityManager用于检索，支持，更新以及删除实体。
If unstable weather conditions persist, please check the Rainstorm Alert 2 hours prior the commencement of that class.
在天气持续不稳定时，请于上课前两小时查询恶劣天气报告。
If unstable weather conditions persist, please check the Rainstorm Alert 2 hours prior the commencement of that class.
在天气持续不稳定时，请于上课前两小时查询恶劣天气报告。
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