汉英对照/膝关节连接大腿和小腿

膝关节连接大腿和小腿,由两个关节组成:一个在大腿骨和小腿骨之间,另一个在大腿骨和膝盖骨之间。

The knee joint connects the thigh and the shank and consists of two joints: one between the thigh bone and the shank bone, and the other between the thigh bone and the kneecap.