when we were talking about biomechanics,

已经涉及到的内容
and that is replacement of the hip.

那就是髋关节置换
I just showed you this drawing here to remind of hip anatomy.

这张图是帮助你回忆一下髋关节的解剖
The pelvic bone is here,

这里是骨盆
which form a girdle at the level of your waist.

在你的腰部水平形成了一个环带状区域
There's a cup inside the pelvic girdle called the acetabulum.

在骨盆带里有一个杯状结构称为髋臼
Into that cup the head of femur fits in a ball-and-socket joint,

股骨头和这个杯状结构形成一个球窝关节
so that your hip has all the range of movement

因此你的髋部能向各个方向运动
that we talked about in class and in section a few weeks ago.

这些我们在几周前的课上都讲过了
If there's a disease of this bone and this needs to be replaced,

如果这块骨头出现病变需要替换
then the general procedure now is to replace not only the part--

那么现在常见的方法是更换...
this part of the hip that contains the joint, the ball,

不仅更换包括关节和股骨头的部分