Determination of postmortem interval (PMI) is one of the most valuable subjects in forensic practice.It, however, is often very difficult to accurately determine the PMI in daily practice.

• 摘要在法医学实践中，死亡经历时间的推断具有重要的实践价值，但其准确推断却一直是法医学实践的难题，因而也一直是法医学研究的热点。