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optical disc

n.
1.a disk coated with plastic that can store digital data astiny pits etched in the surface

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Word of the Day

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    Idiom of the Day

    trouble (someone) for (something)
    to ask someone to give or lend you something
    I do not like to trouble the manager for her time but sometimes I must.



    1.
    If you need help
    (P) promptly and politely
    (Q) ask for attendants
    (R) to help our customers
    (S) who have instructions

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    Nobel Prize : Physiology or Medicine
    Year : 1907
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