该脚本在步骤1读取文件的内容，在步骤2扫描文本寻找根元素并去掉开始部分，以便让人第一眼就能看到根元素。
This script reads the file contents in step 1, and, in step 2 scans the text for the root element and chops off the beginning so that the first thing seen is the start of the root element.
每个进程从同一文件描述符(它只是一个包含数字1至7的文本文件)执行读取操作，并连同PID一起打印所读取的内容。
Each process reads from the same file descriptor (which is just a text file with the Numbers 1 through 7), printing what was read along with the PID.
所有这一切意味着，像最现代的网站——包括我们自己——文本、链接和按钮将重新排列和调整自身大小以使它更易于读取内容或点击按钮。
All this means that like most modern sites - including our own - text, links, and buttons will rearrange and resize themselves to make it easier to read content or tap buttons.
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