以下为句子列表：
英文: The key to improving long jump performance is to command the reasonable rhythm of the final two-step run-up in the premise of keeping up high-speed run-up so as to reach most suitable vertical speed and prancing angle.
中文: 摘要在保持高速助跑的前提下，掌握合理的最后二步助跑节奏，从而获得适宜的垂直速度和腾起角度是提高跳远成绩的关键。
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