Bill Nye The Science Guy on Balance
251.9 هزار بار بازدید -
16 سال پیش
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It would be a long
It would be a long way down, without forces in balance. Bill bikes on a high-rail to show that forces can work together to move things or hold them in balance. Then, as they so often od, grannies and bikers work together to bring balance to the screen and a mud pit. Hmm...
16 سال پیش
در تاریخ 1388/01/19 منتشر شده
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