switchback
switchbacknoun- (Brit.)a road, path, or railway with alternate sharp ascents and descents
(英)时起时伏的道路(或铁路)
■a roller coaster
(游乐场中的)环滑车
- (N. Amer.)a 180° bend in a road or path, especially one leading up the side of a mountain
(北美)公路(或道路)上的180°转弯(尤指转到山的另一侧去)
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