The Naschmarkt is Vienna's most popular market, and it has existed since the 16th century.
纳旭市场是维也纳最为热闹的集市，早在16世纪就已经存在了。
Fuzzy matroids is a theory which is set up by introducing the notion "fuzzy" into theory of matroid, it has existed nearly 20 years old.
模糊拟阵是将“模糊”的概念引入到拟阵理论中而建立起来的理论，已有近20年的历史。
The art education of high normal school came into being with the development of Chinese pre-modern culture, and so far it has existed in China for nearly a century.
中国高等师范美术教育伴随着中国近代文明的开端而产生，至今已在中国存在了近一个世纪。
Speaking of Rules Commission, it has existed for many years already. Each time, different assignment may be given to Rules Commission, depending on current needs of GA.
提到规则委员会，它已经存在很多年了。每次都有不同的工作任务指派给规则委员会，这取决于当时GA的需要。
It has existed for thousands of years.
它已经存在了几千年了。
It has existed for thousands of years.
它已经存在了几千年了。
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