pulse
2020-06-23T00:19:38+00:00
膝盖正中间那个骨头是凸出来的,可以上下左右动,好像一般人都是凹在槽里不能随便动的
[img]https://img.nga.178.com/attachments/mon_202006/26/-7Q5-gq9oXcZ3fT3cSqo-zk.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202006/26/-7Q5-gq9oXcZ3fT3cSqo-zk.jpg.medium.jpg[/img]