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

你的肩关节，努力不要让你的肩膀承受太多冲击。

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

但他们也有更灵活的肩关节； 宽而扁平的肋骨； 和较短的脊椎。

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

该关节的上端位置非常圆，表明食肉牛龙的肩关节具有相当大的灵活性。

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的鸟类，是因为它们的一个肩关节与现存鸟类的肩关节相反。

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

它们的肩关节适合四肢行走，它们留下的奇怪足迹都是四足行走的。

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.

髋关节和肩关节采用窝设计，允许旋转运，但是关节越灵活，它就越不稳定和脆弱——也是为什么你会看到么多脱臼的肩膀和髋关节置换术的原因之一。