Diesel transport was the next stage of evolution. Now gypsum is carried by trucks, and raw material is elevated with the help of special conveyor.
后来的一段时期采用柴油机运输，现在则采用轨道运输，利用特殊的传送带输送原料。
2
At present, the research about the comprehensive evaluation of domestic urban transport system is still in its initial stage, the research about traffic index is less.
目前，国内对于城市交通系统的综合评价的研究还处于初级阶段，交通指数方面的研究更少。
3
The Delhi Transport Corporation's old stage-carriages pause at stops for only half a beat, before plunging back into the traffic.