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second moment

n.
1.the expected value of the square of the deviations of a random variable from the point of origin

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    Idiom of the Day

    give out (something)
    to give something to people, to distribute something
    We gave out more than six hundred balloons at the shopping center.



    1.
    Choose an idiom to replace the expression in the brackets:
    I cannot (decide) if I will go to Japan in December or not.

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