well-functioning                                               

运行良好
in large volumes  大批
crucial 至关重要

规划                                                               

planning
整体                                                                overall
协调 xiétiáo                                                               well-coordinated
一致                                                                consistent
短缺                                                                shortage
膨胀 péngzhàng                        expand
无疑                                                                no doubt
方案                                                                solution
尖锐 jiānruì                                                             incisive
决策者                                                                      policy maker
公交车                                                                  bus
线路密度                                                        network coverage
fú合标准                                                        conform to standards