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radiocarbon dating

n.
1.a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-14

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    (not) know if one is coming or going
    to not know what to do
    The new sales manager does not know if he is coming or going.



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    The hare shot ahead and then decided to ________ down at the side of the path for a rest.

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    The division of blood groups varies between different people in different countries. The only group of people who have the same blood group are american natives - 0.      .. More >>
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