短語(yǔ)詞組短語(yǔ)Brachistochrone Curve 最速曲線;最速降線問題brachistochrone problem 最速降線問題;線問題problem of brachistochrone 最速降線的問題;最速降線問題The brachistochrone problem 最速落徑問題brachistochrone with bounded curvature 界曲率最速降線 返回 brachistochrone