A Study on the Relations Among the Aerobic Endurance, the Lactic Acid Threshold and the Individual Anaerobic Threshold for the Cross Country Skiers是什么意思_A Study on the Relations Among the Aerobic Endurance, the Lactic Acid Threshold and the Individual Anaerobic Threshold for the Cross Country Skiers在线翻译_英语_读音_用法_例句