虽然过去很多年
Although many years have passed
以上为机器翻译结果，长、整句建议使用 人工翻译 。
很多年过去了，我终于有了一个虚拟的名字，虽然是在看不见的网络之上。
For many years, I finally had a fictional name, although is the invisible web.
youdao
在过去的十多年中，虽然很多专家学者投身其中，也取得了可喜的成就，但还难以达到实用的标准。
Rapid development took place in the area during the past ten years, but there are still many problems to be solved.
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