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paraboloid reflector

n.
1.a concave reflector used to produce a parallel beam when the source is placed at its focus or to focus an incoming parallel beam

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    Idiom of the Day

    like to hear oneself talk
    to enjoy talking rather than listening to other people
    My friend likes to hear herself talk and it is very tiring to be around her.



    1.
    At the end of the lesson, I packed everything ________ in the cupboard.

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