bascule span

例句：

1. 1.The boat basculed over the waves with ease.
   船轻松地在波浪上滑行。
2. 2.The car basculed through the narrow streets.
   汽车轻松地穿过狭窄的街道。
3. 3. The ice basculed over the lake in the winter.
   冰在冬天滑过湖面。