特殊用法acnodal cubic1.弧点三次(曲)线bipartite cubic1.双枝三次曲线body-centered cubic1.体心立方cuspidal cubic1.尖点三次线one-circuited cubic1.单围道三次曲线osculating cubic1.密切三次曲线, 密切挠曲线reducing cubic1.约化三次式twisted cubic1.三次挠线two-circuited cubic1.双环道三次线