noun🔗Share冰斗，圈谷 A valley head created through glacial erosion and with a shape similar to an amphitheatre."Hiking up the mountain, we were rewarded with a stunning view of the cwm, a natural amphitheater carved into the rock by ancient glaciers. "爬上山，我们得到了丰厚的回报，眼前展现出一幅壮丽的景色：一个冰斗，也被称为圈谷，这是远古冰川在岩石上雕琢出的天然圆形剧场。geologygeographynatureChat with AIVocabulary GamePractice Reading
