人们应该清醒地认识到，专利的有效期是20年，如果Web根据首次发表日期申请专利保护，那么时至今日我们才能免费使用Web。
It is sobering to think that as patents are valid for 20 years, that had the web been patented and based on this first release date, then it would have only become freely available for use today.
今日可真是个多事的日期。
今日可真是个多事的日期。
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