STEM与日常科技·英语30篇（7）
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Why QR Codes Are Still Everywhere
为什么二维码依然无处不在
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QR codes remain popular because they store more data than traditional barcodes in less space.
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Modern smartphones decode them instantly using built-in cameras and software—not special apps.
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Restaurants use them for contactless menus, reducing paper waste and physical touchpoints.
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Museums embed them in exhibit labels to link visitors to audio guides or 3D models.
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Farmers attach QR tags to produce so buyers can trace food from field to shelf.
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Each code can be updated remotely, meaning content changes without reprinting physical materials.
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They work offline too, unlike many app-based systems that require constant internet access.
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Security has improved: encrypted QR links now verify destinations before opening web pages.
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Even small businesses rely on them for quick access to reviews, payment portals, or loyalty programs.
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Their simplicity, low cost, and universal compatibility ensure continued relevance across industries.