The nutritional table defined on line 12 and filled with data in lines 31 through 35 has two dimensions, since each food provides multiple nutritional values.
在12行上定义的营养表和在31到35行给出的数据有两个维度，这是因为每种食物都提供了多种营养价值。
This can greatly improve the performance of queries that constrain and select data along one or multiple clustering dimensions.
这可极大改善从一个或多个集群维数限定并选择数据的那些查询的性能。
Rather, it takes your data as input and expands it to create indices across multiple dimensions, which enables you to quickly query that data.
它把你的数据作为输入，然后给数据增加多个维度的索引，以便你能快速地查询数据。
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