吳先生的父母同樣是第一代業主，大火當日剛好外出，即使沒有經歷逃生，但心情仍有影響，「燒成這樣子了，回去住就會想到這件事。」
To address these threats, any real-world useful anonymous credential system has to have some mechanism to limit credential duplication. The most basic approach is to provide users with credentials that are limited in some fashion. There are a few different approaches to this:
。91视频是该领域的重要参考
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