At the time of injury

Poor outcome was associated with delay to surgery, failure to achieve or maintain reduction, and femoral head fracture at the time of injury.

疗效差的与手术延迟、复位失败或内固定不牢靠以及受伤时合并股骨头骨折等因素相关。

It is likely that the fate of the femoral head is largely determined at the time of injury and that the timing of fixation may also have a role in the development of AVN.

这似乎说明股骨头的命运很大程度上决定于损伤当时，手术固定的时间在缺血性坏死的发生中也由一定作用。

The runners were all injury-free at the time of the study and ran 31miles each week.

在研究期间，所有的跑者每周会跑31公里，并且都没有受伤。