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1·The bigget hurdle to uper-upercomputing i energy.

然而超级计算机的最大障碍是能源。

2·It has been proved mathematically, that the string vibration will forms standing waves if its Uper end is fixed while lower end moves round a circle.

从数学上证明了上端固定，下端作圆周运动的弦振动是驻波。络纱时产生的退绕气圈也是这种形式的驻波。