结果表明：我国优秀女子铅球运动员在滑步阶段，左腿有效摆动不足，右腿蹬伸力量、速度不佳。
The result shows that the effective swinging of left leg is insufficient and extending strength of right leg is not good at the stage of sliding.
最有可能的是戴表时活动不够，手臂摆动较少，以至手表动力不足所至。
The most likely is that when the table is not enough, the arm swing less, and watch the power shortage to.
在过去的几个世纪里，无数的“鸟人”丧失了生命，他们从高塔或悬崖上跳下来，却不知道他们摆动自制的翅膀时，力量和速度根本不足以维持飞行。
Uncounted numbers of "birdmen" have died over the centuries after leaping from tower or cliff, not realizing they could never flap homemade wings hard or fast enough to stay aloft.
在过去的几个世纪里，无数的“鸟人”丧失了生命，他们从高塔或悬崖上跳下来，却不知道他们摆动自制的翅膀时，力量和速度根本不足以维持飞行。
Uncounted numbers of "birdmen" have died over the centuries after leaping from tower or cliff, not realizing they could never flap homemade wings hard or fast enough to stay aloft.
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