00:00did you find a book fair
00:04which is a good book
00:06which is the most challenging book
00:07this is the country's big research center
00:14the country's biggest research center
00:17which is the most challenging book
00:19so this book fair
00:21is the best
00:23it's the latest publications
00:27the latest researchers
00:41Thank you very much.
00:59Thank you very much.
01:28Thank you very much.
02:15Thank you very much.
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