STEM与日常科技·英语30篇（7）

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为什么二维码依然无处不在

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