noun🔗Share蛇形丘，冰碛蛇丘 A long, narrow, sinuous ridge created by deposits from a stream running beneath a glacier."The hikers followed the winding esker, a long ridge of gravel left behind by a glacier. "徒步者们沿着蜿蜒的蛇形丘前进，那是一条冰川融化后留下来的长长砾石山脊。geologygeographyenvironmentnaturescienceChat with AIVocabulary GamePractice Reading
