It's just very time consuming to get such a large quantity of data.
要收集这么多的数据就是非常耗时。
Data mining (DM) is a new hot research point in database area. Data mining gets knowledge from large quantity of data.
数据挖掘是近年来数据库领域中出现的一个新兴研究热点，它是从大量数据中获取知识。
The useful quality information can be gained by using of statistics, because the quality control deals with large quantity of data.
质量控制工作涉及到大量的质量数据，运用数理统计学的知识把这些数据进行整理、归纳就可以得到我们所关心的质量信息。
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