switchbacks是什么意思？

switchbacks

• n. 在Z形路轨向原来的方向返驶，改变角度( switchback的名词复数 )；

例句

• The Grand Challenge race would be 142 miles of perilous mountain switchbacks and rough, sandy trails. 大挑战赛车会有228公里危险的蜿蜒山路,以及崎岖不平又多沙的路面.

柯林斯高阶英汉双解学习词典释义

• 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.
  例句
  ...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
• 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.
  例句
  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。