研究表明：教学的重点难点应根据投掷步技术在投掷步过程能否体现速度和节奏以及是否有利于最后用力来确定。
The points depend on whether the techniques can demonstrate speed and pace and whether they are in turn beneficial to the last strength.
投掷标枪中，左腿在交叉步与最后用力的衔接中起到了引导、动和支撑的作用。
In the javelin throw, the left leg plays the roles of guiding, braking and sustaining in the join of cross steps and final force.
从生物力学角度对掷标枪最后用力的左侧支撑进行分析，论证了左侧支撑是标枪投掷技术中的重要技术环节。
This article analyses the left-side strut in putting forth the last strength in javelin throwing from the biomechanics Angle, proves that left-side strut is an important link in javelin technique.
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