结果表明：影响标枪出手速度的首要因素是标枪离手时的左膝角，说明左腿迅速而充分的蹬伸对出手速度起着重要的影响作用。
The results showed that the first factor is the Angle of the left knee when releasing. It is proved that rapid and full push of the left leg has a great effect on the release speed.
结果表明：影响标枪出手速度的首要因素是标枪离手时的左膝角，说明左腿迅速而充分的蹬伸对出手速度起着重要的影响作用。
The results showed that the first factor is the Angle of the left knee when releasing. It is proved that rapid and full push of the left leg has a great effect on the release speed.
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