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  1. Portland cement

    • IPA[ˈpôːrtlənd səˈment]

    美式

    • n.
      cement that is manufactured from limestone and clay and that hardens under water.
    • noun: Portland cement

    • 更多解釋
    • IPA[pɔːtləndsɪˈmɛnt]

    英式

    • n.
      cement manufactured from chalk and clay which hardens under water and when hard resembles ...

    Oxford Dictionary