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。
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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.