Because there are exactly two wrists.

因为有两个腕。

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

这种疾病影响了幼崽的前肢，使前肢腕过度伸展。

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

今年，由于新的肘腕的出现，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.

呼骨科来看看他的腕，并告诉CT那边我们马上到。-好的，Shepherd 医生。

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

桡骨尺骨连接在肘腕间。

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，掉进了一个白蚁洞里，它的腕扭得很厉害。

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

然后大提琴手得了 腕综合症。

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，比如肘腕都有支撑物，必要的时候使用人体工程学的辅助设备。

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，这与施加在腕踝小骨头上的压力有。