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nitrification

n.
1.the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound)
2.the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)

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    Idiom of the Day

    in the right
    on the right or legal side of an issue
    I was in the right when I was involved in the car accident at the intersection.



    1.
    He was walking along the streets which were usually so crowded, but that afternoon for some reason they looked ________ .

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