追根究底 | 本集 精彩教學影片(講解老師:Shane& Bernice 老師)
The barcode, the QR code’s older sister, is limited to 20 characters of information and can only be read horizontally. In contrast, QR codes can hold about 7,000 characters of information and can be read at any angle. Also, unlike barcodes, they don’t require specialized devices to be read. The camera in your smartphone will do, as most modern phones include scanning functions.
For a QR code to be scanned, it must contain three black squares in three of the code’s corners. These small squares help the camera determine the position of the code. There must also be an empty white border around the outside of the QR code. This blank space, or the quiet zone, is used to help the camera identify the start and end of the code. The rest of the black squares and dots inside the code all represent data that can be turned into readable information.
Sarah is usually quiet. In contrast, her brother is always noisy.
莎拉通常很安靜。相較之下,她弟弟一向很吵。
Various art forms were integrated into the exhibition to make it more interesting.
該展覽融入了多種藝術形式,使其變得更加有趣。