droop line
英
美
- droop v.低垂；下垂；(草木)枯萎；(精神)萎靡n.下垂；消沉
- line n.线；界线；皱纹；路线；航线；行；台词；行业；绳子；家族v.排队；画线；加衬里
- Draw a line perpendicular to the horizontal axis through the point.
通过这两直线的交点做横轴的垂线。
- We assume this curve has the property that every vertical line intersects it once at most.
假想这条曲线具有这样的的性质，每一条垂线与其至多相交一点。
