hogback

名词 hogback:

1. a narrow ridge of hills
   同义词：horseback

hog.back

n.（名词）
A sharp ridge with steeply sloping sides, produced by erosion of the broken edges of highly tilted strata.
豚脊丘，陡峻的山脊：由于对高斜层破碎山背的侵蚀而形成的陡峭的山背