protrusion of joint

例句：

1. 1.The car's front bumper is a good example of a protrusion.
   汽车的前保险杠是一个很好的突出物的例子。
2. 2.The surgeon removed the tumor as a protrusion from the patient's brain.
   外科医生从患者的脑中切除了一个肿瘤作为突出物。
3. 3. The spider's legs are protrusions that allow it to climb and hunt prey.
   蜘蛛的腿是突出物，使它们能够攀爬和捕食猎物。