The fossils are the oldest-known evidence of the false thumb, which is really an enlarged wrist bone called the radial sesamoid.

这些化石是目前已知关于伪拇指的最老证据，伪拇指实际上是一块叫做桡侧籽骨的增大腕骨。

Okay, the panda's wrist bone adaptation acts like a clamp.

好的，熊猫的腕骨适应性就像一个夹子。

Also, the carpals in their wrists were elongate and made a greater contribution to the length of the wing.

此外，它们手腕处的腕骨伸长，的长度贡献更大。

In 1896, newly invented x-rays were used to produce a radiograph showing the position of a bullet lodged in a boy's wrist bone.

1896年，新发明的X射线被用于制作一张X光片，清晰显示了一颗嵌入男孩腕骨的子弹位置。

All these motions use gliding, or plane joints, like the one between the distal ends of your radius and ulna, and the carpal bones of your wrist.

所有这些运动都使用滑动或平面关节，比如桡骨远端和尺骨之间的关节，还有手腕的腕骨。

I think I'm going to get these numbers a bit wrong, I'm sure, but I think Peter mentions that that leads to death in a large percentage of people that break that hip or break that leg or break that wrist even.

我认为我会把这几个数字弄错一点，但我确定， 彼得提到这会导致很大比例的髋骨、腿骨或腕骨骨折的人死亡。