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rubidium-strontium dating

n.
1.geological dating based on the proportions of radioactive rubidium into its decay product strontium

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  • Idiom of the Day

    sticky fingers
    fingers that steal things that one sees and wants
    The young boy has sticky fingers. You must watch him all the time.



    1.
    Choose an idiom to replace the expression in the brackets:
    Our boss is (making the decisions) for the new project.

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