Strengthening your shoulder joints as you go, trying not to like shock load your shoulder.

加强你，不要让你膀承受太多冲击。

But they also had more flexible shoulder joints; broad, flat rib cages; and a shorter spine.

但他们也有更灵活； 宽而扁平肋骨； 和较短脊椎。

It's very round at the upper end, and that's suggest that its shoulder joint had quite a bit of mobility.

该上端位置非常圆，表明食肉牛龙具有相当大灵活性。

They were only called opposite birds because one of their shoulder joints was the reverse of what's seen in living birds.

它们之所以被称为相反鸟类，是因为它们一个与现存鸟类相反。

They have shoulder joints that are oriented for walking on all fours, and the weird tracks they left behind are all quadrupedal.

它们适合四肢行走，它们留下奇怪足迹都是四足行走。

Hip and shoulder joints use a ball-and-socket design that allow rotational movement, but the more flexible a joint is, the more unstable and fragile it is — which is one reason why you see so many dislocated shoulders and hip replacements.

髋和采用球窝设计，允许旋转运动，但是越灵活，它就越不稳定和脆弱——也是为什么你会看到么多脱臼膀和髋置换术原因之一。