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top quark

n.
1.a hypothetical quark with a charge of +2/3 and a mass more than 100,000 times that of an electron

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  • photon
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    Idiom of the Day

    royal treatment
    very good treatment
    My parents receive the royal treatment when they go to visit their relatives.



    1.
    which all describe the kind of sleep that can be ________ at a moment's notice.

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