The first level is the traditional Discretionary Access Control (DAC).

第一级是传统的自主访问控制(Discretionary Access Control,DAC)。

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For example, Bitcoin is technically the first DAC ever created.

例如，比特币在技术上就是有史以来第一个DAC。

youdao

For example, Bitcoin is technically the first DAC ever created.

例如，比特币在技术上就是有史以来第一个DAC。

youdao