从本周推出的操作系统最新版本Windows 7开始回溯，回望过去十年盖茨的某些担心开始应验。
Roll forward 10 years to the launch this week of the latest version of its operating system, Windows 7, and some of Gates' fears have come to pass.
以上表达式综合运用了字符分组，贪婪操作符、回溯，以及最小化组团来匹配嵌套标签。
The above expression combines character groups, greedy operators, back-tracking, and atomic groups to match nested tags.
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