以下为句子列表：
英文: A lot of data in database is continuous variable, the future value of this data is expected to be predicted, the predicted only need a range of variation, but need an exact value.
中文: 摘要数据库中有许多数据是处于不断变化中的，对于这些数据，人们希望能对其未来的取值作出预侧，预测的结果并不需要知道这些数据的具体取值，而只需得出一个变化范围。
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英文: The Six Sigma Black Belt should be able to compute the value of money held or invested over time, including present value and future value of a fixed sum.
中文: 6西格玛黑带应能计算出所持资金或者已投资金的价值，包括现值和未来价值的固定总和。
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