求翻译：摘 要：本文运用田径理论、图表测量法、文献资料法，从运动人体解剖学、运动生物力学角度等，对铅球左侧支撑技术动作进行分析，探讨左侧支撑对提高运动成绩的积极因素，从而进一步阐明左侧支撑在铅球最后用力的重要作用。结果表明：在最后用力过程中，左腿主要的主动快速着地和支撑用力可获得良好的超越器械姿势，取得适合自己的出手高度、出手角度、产生最大的爆发力、获得最大的出手速度，能够有效地提高铅球成绩。是什么意思？

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Abstract: This article utilizes the track and field theory, the graph survey law, the literature material law, from the movement anatomy, the movement biology mechanics angle and so on, supports the technical movement to the shot left side of to carry on the analysis, left side the discussion suppor

Abstract: the use of this measurement method of track and field theory, charts, documentation methods, from the perspective of moving human body Anatomy, biomechanics, to analyze the left support technique in shot put, explore the positive support to improve their scores on the left, so as to furthe

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