Because there are exactly two wrists.

因为有两个关节。

It affected the young animal's front legs, which became hyperextended.

种疾病影响幼崽的前肢，使前肢关节过度伸展。

This year Forpheus is able to strike back with its own spins thanks to new elbows and wrist joints.

今年，由于新的肘关节和关节的出现，Forpheus可以用自己的旋转进行反击。

Page ortho to take a look at his wrist and let c. t. know we're coming. -Yes, Dr. Shepherd.

呼骨科来看看他的关节，并告诉CT那边我马上到。-好的，Shepherd 医生。

The radius and ulna bones connect between the elbow joint and the wrist.

桡骨和尺骨连接在肘关节和关节之间。

So Jabu, the African elephant from Botswana, he actually fell into a termite hole and he twisted his wrist really bad.

来自博茨瓦纳的非洲象Jabu，掉进一个白蚁洞里，它的关节扭很厉害。

Oh, and then the cellist has carpal tunnel syndrome...

然后大提琴手 关节综合症。

Make sure all parts of your body, like your elbows and wrists, are supported, using ergonomic aids if you need to.

确保你身体的每一个部分，比如肘和关节都有支撑物，必要的时候使用人体工程学的辅助设备。

In one wrangle then wrestle, Ralph wrenched the other one's wrist carelessly.

在一次口角继而扭斗中，拉尔夫不慎扭伤另一个人的关节。

But researchers hypothesize that it has to do with the pressure placed on the small bones of the wrist and ankle joints when an animal has to do more with its limbs than just paddle.

但研究人员推测，当动物需要用四肢做更多事情而不仅仅是划桨时，与施加在关节和踝关节小骨头上的压力有关。