“臀骨”的英语？

臀部稳固而略倾斜,臀骨几乎不可见.Croup well formed and only slightly inclined with hip bones hardly apparent.臀部几乎是平的, 臀骨距离分的较开, 臀部圆形,平滑地融入后腿.Hips croup nearly flat. Hip bones wide apart, hips rounded and blending smoothly into hind legs...