switchback

noun

1. （公路或铁路坡道上的）之字形路线；（公路或铁路的）不断起伏的路线
   a road or railway/railroad track that has many sharp bends as it goes up a steep hill, or one that rises and falls steeply many times
2. （陡坡路上的）急转弯，180度的转弯
   a 180 degree bend in a road that is going up a steep hill
3. （陡坡路上的）急转弯，180度的转弯
   a 180 degree bend in a road that is going up a steep hill

1. N-COUNT (公路的)之字形坡路，不断起伏的路线;陡坡
   A switchback is a road which rises and falls sharply many times, or a sharp rise and fall in a road.
   1. ...a dizzy bus ride over a switchback road.
      乘公共汽车驶过一段颠簸起伏的公路时感到头晕目眩
2. N-COUNT (有连续急转弯的)上山公路;(公路上的)急转弯
   A switchback is a road which goes up a steep hill in a series of sharp bends, or a sharp bend in a road.
   1. Several hundred yards beyond the first switchback in the road, he came to the second bend.
      过了公路上第一个急转弯几百码处，他又遇到了第二个急转弯。

1. Several hundred yards beyond the first switchback in the road, he came to the second bend.
   过了公路上第一个急转弯几百码处，他又遇到了第二个急转弯。
2. Finally, this paper analyses the quantity of operating trains and the requirements of the switchback stations under the mixed running mode.
   并以上海城市轨道交通某线路为例，分析了不同编组混合运行条件下，车辆运用数量比较以及折返站要求等问题。
3. The different losses of transport capacities are caused by crossing routes when the regional rail line takes different reentrant patterns in the middle switchback stations. Adaptability analysis is accomplished on Turn-back capacity of switchback stations according to different train routing mode.
   轨道交通市域线在中间折返站采取不同折返形式，由进路交叉干扰所产生的能力损失不同，文章针对不同交路模式在中间折返站进行了能力适应性分析。