给合适的计算机一个庞大的人脸数据库，它就可以以惊人的速度和精度处理看到的东西，然后按照指示识别人脸。

Give the right computer a massive database of faces, and it can process what it sees—then recognize a face it's told to find—with remarkable speed and precision.

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字符串数据长度的变化或数值型数据精度和等级的变化也表明在数据的表示、验证和使用上存在潜在的问题。

Variations in length for string data or in precision and scale for numeric data also point to potential issues in data presentation, validation, and usage.

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关于结构一致性和数据精度的问题，是通过查看列的数据属性的定义和推断来回答的。

Questions around the structural consistency and, to some extent, the precision of the data are answered by reviewing the definitions and inferences of the column's data properties.

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So, a 32 bit of float gives you a bunch of precision.

2比特的浮点型数据精度更大。

哈佛公开课 - 计算机科学课程节选