squash racquet
squash racquet
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It could be something like this a squash racquet .
也可能是其他东西,像壁球拍。
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And so we have here a squash racquet and we have here the center of mass .
这里有一只壁球拍,这里是质量重心。
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So the behavior of the center of mass is extremely predictable , whereas the behavior of the squash racquet is not .
那么整体中心的运动,就是可预测的,而壁球板运动不可知。
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If the external force on the squash racquet were zero , then it would continue to go always with the same velocity , the center of mass .
若壁球板受外力为,它可能会一直运动,保持同样的速度,而整体的中心。
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So the next time I see a squash racquet , I will silently salute girls such as Malala and Maria Toorpakai - and be profoundly grateful for the freedom that women take for granted in the west .
所以下次我再看到壁球拍,我会默默向马拉拉和玛利亚•图帕凯这样的女孩们致敬——并由衷感激自己享有的自由,虽然它已被西方女性视作理所当然。