All dinosaurs have hip joints that support the legs more or less straight under the body.

所有恐龙都有髋关节，或多或少地支撑身体下方的腿。

It can be safe as long as the swaddling allows a baby's legs to bend up and out at the hips, allowing the hip joints to develop normally.

只要能保证襁褓让宝宝的腿部可并且臀部位置合适，臀部骨关节能够正发育，那就是安全的。

Wow! She is really hyper flexible. It's hypermobility, not just in the knee joint, but in the hip joint as well. Cause to do that whole rotation there, I could see that causing a significant problem medically down the line.

哇 她真的 这是关节过度动综合征 不仅是膝关节 髋关节也是 因为这一整套旋转动作做下来 我可预料这样下去会导致一个重大的医学问题。

Will replacement of a hip joint become more commonplace? Could a doctor operate on one of our organs without having to invade our bodies? Could surgery be performed with the aid of a small that it would be measured in millimeters?

医生能够不触及人体就能对某个器官动手术吗? 手术能够借助小型照相机进行吗? 照相机镜头的直径可能小到毫米下吗?