科学素养与生活应用·英语30篇（4）
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Why QR Codes Are More Than Just Squares
二维码为何不只是简单的方块图案
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QR codes store data in black-and-white modules arranged in a square grid, readable by smartphone cameras.二维码通过黑白模块组成的方形网格存储数据，智能手机摄像头可识别。
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Each code contains alignment patterns, timing markers, and error-correction codes that let devices decode information even if part is damaged.每个二维码包含定位图案、定时标记和纠错码，即使部分受损，设备也能解码信息。
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They hold far more data than traditional barcodes—up to 4,296 alphanumeric characters in one standard version.其数据容量远超传统条形码——标准版本最多可存储4296个字母数字字符。
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When you scan a QR code, your phone’s camera captures light and dark areas, then software converts them into binary digits.扫描二维码时，手机摄像头捕捉明暗区域，软件将其转换为二进制数字。
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These digits are decoded using Reed–Solomon error correction, which recovers lost or blurred data reliably.这些二进制数字采用里德-所罗门纠错算法解码，能可靠恢复丢失或模糊的数据。
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Businesses use them for contactless menus, payment links, and product traceability from factory to shelf.企业用它实现无接触菜单、支付链接及产品从工厂到货架的全程溯源。
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Educators embed them in textbooks to link students directly to videos, quizzes, or 3D simulations.教育者将二维码嵌入教材，直接链接学生至视频、测验或3D模拟。
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Unlike URLs typed manually, QR codes reduce input errors and speed up access to digital resources significantly.相比手动输入网址，二维码大幅减少输入错误，显著提升数字资源访问速度。
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Newer versions support dynamic content—meaning the destination link can be updated remotely without reprinting the code.新版支持动态内容——目标链接可远程更新，无需重印二维码。
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This tiny technology bridges physical objects and digital information seamlessly and securely.这项微小技术无缝且安全地连接物理对象与数字信息。