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1. Oxford Dictionary

   expansivity

   • IPA[ɪkˌspanˈsɪvɪti]

   英式

   • n.
     the amount a material expands or contracts per unit length due to a one-degree change in temperature.

   • noun: expansivity

2. • 更多解釋

   expansivity

   • IPA[ikˌspanˈsivədē]

   美式

   • n.
     the amount a material expands or contracts per unit length due to a one-degree change in ...

   Oxford American Dictionary