Many programs draw objects on the screen with polylines. A polyline is a graphics programmer's term for a multisegment line defined by an array of vertices.

许多程序在屏幕上画出的对象呈折线形，折线是绘图程序的专用术语，专指由一系列顶点定义的多段线条。

Based on the character of multisegment seat inventory in revenue management system, utilizing the model of EMSR, the paper advances the multisegment seat inventory model which separates flight.

利用EMSR(期望边际收入)模型，根据收益管理系统中多航段座位分配的特点，建立了分离航班的多航段座位优化分配模型。