fracture origin

例句：

1. 1. The fracture origin is a complex process that involves several steps.
   骨折起源是一个复杂的过程，涉及多个步骤。
2. 2.The fracture origin can be caused by various factors such as trauma or aging.
   骨折起源可能由各种因素引起，如创伤或衰老。
3. 3.Researchers have been studying the fracture origin for decades to find new treatments for bone injuries.
   研究人员已经研究了骨折起源几十年，以寻找新的治疗骨伤的方法。