RDQL allows complex queries to be expressed concisely, with a query engine performing the hard work of accessing the data model.
RDQL允许简明地表达复杂的查询，查询引擎执行访问数据模型的繁重工作。
RDQL allows complex queries to be expressed concisely, with a query engine performing the hard work of accessing the data model.
RDQL允许简明地表达复杂的查询，查询引擎执行访问数据模型的繁重工作。
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