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1. Oxford American Dictionary

   brachistochrone

   • IPA[brəˈkistəˌkrōn]

   美式

   • n.
     a curve between two points along which a body can move under gravity in a shorter time than for any other curve.

   • noun: brachistochrone, plural noun: brachistochrones

2. • 更多解釋

   brachistochrone

   • IPA[brəˈkɪstəkrəʊn]

   英式

   • n.
     a curve between two points along which a body can move under gravity in a shorter time than for ...

   Oxford Dictionary