yán / jiū / rén / yuán / yòng / shēng / wù / lì / xué / fāng / fǎ / fēn / xī / yùn / dòng / yuán / de / pǎo / bù / zī / shì研究人员用生物力学方法分析运动员的跑步姿势。Researchers use biomechanical methods to analyze athletes' running posture.