pdlsCOCA²³³⁹¹⁴BNC¹⁷³⁹⁹⁵⁺² 基本例句 🌏Porsche Dynamic Light System;照明系统;保时捷动态大灯系统原型pdl的复数 On the basis, this paper study on the optimization method of rolling stock planning problem and crew planning problem according to the operation characteristics of PDLs in our country, . 在此基础上,结合我国客运专线运营背景下问题的具体特点,对动车组运用计划和乘务计划问题的优化方法进行研究。 fabiao