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1. Oxford Dictionary

   osteoporosis

   • IPA[ˌɒstɪəʊpəˈrəʊsɪs]

   英式

   • n.
     a medical condition in which the bones become brittle and fragile from loss of tissue, typically as a result of hormonal changes, or deficiency of calcium or vitamin D.

   • noun: osteoporosis

2. • 更多解釋

   osteoporosis

   • IPA[ˌästēōpəˈrōsəs]

   美式

   • n.
     a medical condition in which the bones become brittle and fragile from loss of tissue, ...

   Oxford American Dictionary