中学一年级 · 阅读系列
Lesson 42 · How Does a QR Code Work?
文体:问答 · 朗读音轨 42

先听一遍
边听边想:黑白方格图案里存着什么信息?
展开英文短文,再悬停查词
A QR Code is a square made of black and white patterns. A phone camera can scan it. Software reads the small blocks and changes them into data, such as a web address.
Large marks near three corners are position markers. They help the reader find the code’s direction. QR Codes also contain extra information. With it, some data can be restored even after minor damage.
Scanning is not the same as trusting. Check the address before opening an unknown page.
逐句跟读
点击任意一句听 Dicvo 的 Jenny 英语语音;开始连续播放前可选择每句播放次数。同一句的每遍之间、切换到下一句之前,都会留出约一遍句子时长供你跟读。原有整篇朗读仍可在上方播放。
请选择一句开始。
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A QR Code is a square made of black and white patterns.
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A phone camera can scan it.
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Software reads the small blocks and changes them into data, such as a web address.
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Large marks near three corners are position markers.
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They help the reader find the code’s direction.
-
QR Codes also contain extra information.
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With it, some data can be restored even after minor damage.
-
Scanning is not the same as trusting.
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Check the address before opening an unknown page.
读懂了什么?
读完后,试着用一句话说出本文的主要意思,并从原文找出支持它的一句话。
查看中文译文
二维码是由黑白图案组成的正方形。手机摄像头可以扫描它。软件读取那些小方块,把它们转换成数据,例如网址。
靠近三个角的大方块是定位标记,帮助设备判断二维码的方向。二维码还含有额外信息,因此在轻微损坏后,有些数据仍能恢复。
扫得出来,不代表链接值得信任。打开陌生网页前,要先检查网址。
本课重点词语
以下是本课重点词语的中文讲解;英文正文中有虚线的单词可悬停查看词义和发音。
- QR Code
- 二维码;QR Code 是 DENSO WAVE 的注册商标。
- square
- 正方形;广场。本文是正方形。
- pattern
- 图案;有规律的形状。
- phone camera
- 手机摄像头。
- scan
- 扫描;读取。
- data
- 数据;信息。语法上可作单数或复数。
- web address
- 网址;网络地址。
- position marker
- 用于确定位置的标记。
- restore
- 恢复;复原。
- damage
- 损坏;损伤。
背景知识
二维码最早在日本开发,后来也成为国际标准。定位图案帮助设备识别方向,纠错数据则让部分污损或缺角的二维码仍可能被读取。但扫描成功并不代表它指向的网站安全。
资料来源:DENSO WAVE,QRcode.com 上关于二维码与纠错功能的说明。