| 释义 |
switch·backBrE /ˈswɪtʃbæk/ NAmE /ˈswɪtʃbæk/ noun 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 （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(NAmE ) a 180 degree bend in a road that is going up a steep hill （陡坡路上的）急转弯，180 度的转弯(old-fashioned , BrE ) = roller coaster |