复数： bloodstains

Bloodstain pattern software continues to be a mainstay since .

年以来血迹样式软件持续成为一个中流砥柱。

Every few weeks , the damp bloodstain would reappear .

每隔几个星期，潮湿的血迹将重新出现。

As he was doing so , he saw bloodstain on the duvet .

当他这样做时，他看到血迹的羽绒被。

Bloodstain pattern analysis in a case of fatal varicose vein rupture .

案例报导:致命性静脉曲张破裂的血迹型态分析。

Bloodstain is one of the most common traces at the scene of crime .

血迹是命案现场上常见的痕迹之一。