storing_and_retrieving_data_有道手机词典

1.As part of this exercise, you will also learn about the EntityManager API for storing and retrieving data, rather than the simple map APIs.
作为本练习的一部分，您还将学习使用EntityManager API存储和检索数据，而不是使用简单的map API。
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2.Directory operations include storing new data in a directory, searching for and retrieving stored data, deleting unwanted data, updating obsolete data, and similar operations.
目录操作包括把新数据保存到目录，搜索和检索保存的数据，删除不需要的数据，更新过时数据，以及类似的操作。
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3.Such a'radio' receiver would require far fewer and less complex structures than awarehouse capable of storing and retrieving a lifetime of data.
与一个存储及追忆一生数据的仓库来说，这个“收音机”只要求很少以及复杂度很低的组成结构。
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