pit annulus

例句：

1. 1. The doctor performed surgery to repair the damaged pit annulus.
   医生进行了手术来修复受损的关节囊。
2. 2.The patient had to undergo a procedure to remove the foreign object from his pit annulus.
   患者必须接受一个程序，将异物从他的关节囊中取出。
3. 3.The injury caused severe pain and swelling in the pit annulus area.
   受伤导致关节囊区域剧烈疼痛和肿胀。