“轨道的”用英语怎么说

它使火车在通过现有轨道的弯曲处时得以保持恒定的车速。It allows the train to maintain a constant speed through the twists and turns of existing track.实2p轨道的形状是两个分开的变形的椭球.The shape of a real 2 p orbital is two separated, distorted ellipsoids.必须修改贯穿式...