The term“sculptured surface”denotesthose surface shapes which“cannot be continuously generated”and havethe arbitrary character of the forms traditionally modeled by sculptors——Duncanand Mair（1983）（自由曲面指表面形状不能被连续加工的，具有传统加工成型的任意性特点的曲面。）
The term“sculptured surface”denotesthose surface shapes which“cannot be continuously generated”and havethe arbitrary character of the forms traditionally modeled by sculptors——Duncanand Mair（1983）（自由曲面指表面形状不能被连续加工的，具有传统加工成型的任意性特点的曲面。）