Tramcars ran throughout the night on new year 's eve . 有轨电车除夕通宵行驶。
Mainly, it is a railroad junction . 它主要是个铁路联轨站。
The subject of orthogonal trajectories remained dormant . 正交轨线的问题一直处于沉寂状态。
Monorail vehicles and ships use gyro verticals for stabilization . 独轨车辆及船舶上使用陀螺垂直器作为稳定之用。
We were sidetracked for a long time and children came and peeked in . 我们乘的火车在旁轨上停了好久，有些儿童进来窥探。
In the south they are putting in a wide-gauge track to replace the old narrow-gauge lines . 在南面，他们正在铺设宽轨的铁道儿代替原先的窄轨的铁道。
If he did not catch the last tram he had to walk, and that made him very late . 他如果没赶上最后一趟有轨电车就得走着回家，那样的话，到家就会很晚了。
These reactions involve electrondonation from the incoming ligand to the empty d-orbitals of the molybdenum . 这些反映包括进入的配位体对铝的空d轨的电子给予作用。
A gray bird flew above them, above the electric wires for the street car line, and perched on the metal cornice of a roof . 一只灰鸟从她们的头顶上飞过，越过有轨电车线，最后停歇在一家屋顶的金属横檐上。
We may draw curves which have everywhere one of these directions for a tangent, these curves are called stress trajectory . 我们可以画一簇曲线，这簇曲线处处都有一个主方向作为切线，这些曲线叫做应力轨线。
