Either of two large flat bones each forming one of the lateral halves of the pelvis and consisting of the fused ilium,ischium,and pubis.

髖骨構(gòu)成骨盆側(cè)向部分的兩塊大而平的骨骼XXXX色视频在线观看免费，由合并的髖骨，坐骨和恥骨組成在腰椎下是五個(gè)椎骨融合在一起形成的骶骨国产精品激情视频。

Even though you are drawing your thighs into the backs of your legs strongly, tuck your sacrum underneath.

即使強(qiáng)烈地拉你的大腿進(jìn)入你腿后側(cè)八月色婷婷激情小说，也要向下塞骶骨。

The five vertebrae next to the lumber vertebrae are fused together to form the sacrum.

在腰椎下是五個(gè)椎骨融合在一起形成的骶骨日韩操逼视频。

It has been suggested that the architecture of the lower lumbar vertebrae and sacrum (e.g., inadequate separation between the inferior articular process of L4 and the superior articular process of L5, a wedged-shape interfacet region of L4, a more frontally oriented lumbar facet, and a wider sacrum), pelvic orientation and lumbosacral parameters (e.g., pelvic incidence, sacral table angle) may play a role in the development of spondylolysis.

低位椎體和骶骨的結(jié)構(gòu)（如L4下關(guān)節(jié)突與L5上關(guān)節(jié)突間隔不足直接看的黄色网站污污污十八，L4下關(guān)節(jié)突成楔形，腰椎小關(guān)節(jié)方向過(guò)分偏額面方向免费看A级黄色视频，骶骨過(guò)寬）美女的隐私秘视频网站喷水，骨盆方向和腰骶段的參數(shù)（如骨盆影響和骶骨水平角）可能在脊柱滑脫的發(fā)展中扮演重要角色。

Shanghai massage another a square follow vertebrate both sides two point, use hands index finger and thumb tail from the tail Mao bone end, start to knead a skin quietly, however knead a skin first to take by inchmeal and forward, often push a neck to descend the tallest vertebrate part, calculate make 1 time, bottom-up continue to knead to take 4-6 times, calculate make once.

另一方沿脊椎兩旁二指處清纯唯美欧美色图，用雙手食指和拇指從尾骶骨末尾亚洲国产精品色一区二区三区色牛，將皮膚悄然捏起，然先將皮膚徐徐地向前捏拿美国无码一级视频，不時(shí)推到頸下最高的脊椎部位最新99在线拍视频，算作1遍，由下而上延續(xù)捏拿4-6遍亚洲性爱有码，算作1次久久黄色视频。