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drag coefficient

n.
1.the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body

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Word of the Day

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    Idiom of the Day

    elbow grease
    the effort and strength to clean something
    We will have to use much elbow grease to clean the kitchen.



    1.
    Choose an idiom to replace the expression in the brackets:
    When the meeting started everybody began to (complain).

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