... 记分牌scoreboard 跳伞塔parachuting tower 观演建筑theatrical building ...
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The problems of a parachute jump, parachuting from tower and from a great height are analyzed by Newton's mechanical principles.
用牛顿力学原理分析了跳伞降落、跳伞塔跳伞和高空跳伞的问题。
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