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我们核实过的事。

文章不多，但每一篇都有出处。我们给出的数字都可核查——即使对我们不利。

2026年8月8日阅读约 7 分钟 Permanent QR codes: what “free for life” actually means A printed QR code can last for years. But what about the service behind it? We went through the promises of fourteen digital business cards, one by one — including our own. 阅读文章