英语语法分析

I have two femurs.

我有两个大腿骨。

Methods 244 specimen femurs and 12 fresh cadaver femurs were selected randomly.

方法：随机选出已知性别244侧股骨和12例新鲜右侧膝关节。

Eupodophis had a simplistic pelvis and straight, slender femurs, the researchers found.

研究人员发现，真足蛇有着极为简单的骨盆和笔直、细长的股骨。