Two complete front-panel settings (parameter selection and the sweep control) can be stored in a non-volatile memory and recalled at any time with a single key operation.

两个完整的前面板设置（参数选择和扫描控制）可以储存在非挥发性记忆体，并回顾在任何时候用一个关键作业。

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If more than one column is aggregated using the same grouping key or without a grouping key, then all the aggregations are computed within the same operation with a single pass over the data.

如果利用相同的分组关键字或者没有分组关键字，来聚合多个列，那么，所有的聚合都在单个数据传递中的相同操作中进行。

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The key point is that no single interaction achieves the meaning of the required service operation.

关键是，任何单一交互都不能实现所需的服务操作的目标。

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