1N-COUNT [oft NOUN n](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. (公路的)之字形坡路,不断起伏的路线;陡坡 [British]
...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
2N-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. (有连续急转弯的)上山公路;(公路上的)急转弯 [US]
Several hundred yards beyond the first switchback in the road, he came to the second bend.