对于大型数据集来说，无论它们是文本还是数值，一般都可以将类似的项目自动组织，或集群，到一起。
Given large data sets, whether they are text or numeric, it is often useful to group together, or cluster, similar items automatically.
一旦湿度达到了一定的数值，探雾器就会自动激活雾号。
Once this reaches a certain level, the detector automatically activates the foghorn.
数值是由设备自动生成的。
This numeric value is automatically generated by the appliance.
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