properly intersect

• 固有相交的

properly intersect的用法和样例：

例句

1. A unicoursal curve is formed by starting at any point on a sheet of paper and drawing a smooth line that may intersect itself.
   一条单行曲线是指从纸上任意一点出发画出的一条光滑的可以自身相交的曲线。
2. The pie shape is defined by a partial outline of an ellipse and the two radial lines that intersect the endpoints of the partial outline.
   扇形由椭圆的一部分轮廓和两条与部分轮廓的终结点相交的射线定义而成。