它们都是基于专有标准的封闭世界。

They are closed worlds based on proprietary standards.

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同时DCWA支持争论推理，为广义封闭世界假设提供了一种逼近。

DCWA also provides an approximation for the generalized closed world assumption (GCWA) and supports argumentation.

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网络为任何一个有键盘和网络连接的人打开了职业编辑和新M记者的封闭世界。

The web has opened the closed world of professional editors and reporters to anyone with a keyboard and an internet connection.

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