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Unveil group of daily life small mystery- We encounter group of a few mysteries in daily life middling, if somebody is us to solve, that is too good. Pittsburgh city blocks Neijitu the employee of ministry of book house science and technology is doing this kind of good work all...
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- How to decide ancient wood time
- A kind of method that archaeologist determines Gumunian is acting is to use a radio isotope to regard “ clock as ” , will measure long time, this calls a radio isotope ancient bronze mirror year law. The carbon in nature basic...
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