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  1. Oxford Dictionary

    urea

    • IPA[jʊˈriːə]

    英式

    • n.
      a colourless crystalline compound which is the main nitrogenous breakdown product of protein metabolism in mammals and is excreted in urine.

    • noun: urea

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    urea

    • IPA[yo͝oˈrēə]

    美式

    • n.
      a colorless crystalline compound which is the main nitrogenous breakdown product of protein ...

    Oxford American Dictionary