这种不稳定性的机制是基于声波在其同心圆半径和冲击之间的循环。
The mechanism of this instability is based on the cycle of acoustic waves between their corotation radius and the shock.
但即便这一圆环结构最后被证实果真是大爆炸之前的遗迹，循环宇宙的想法可能也未必是最完美的模型解释。
But even if the circles really do stem from sources in a pre-Big Bang era, cyclic cosmology may not offer the best explanation for them.
意大利则懒散地闲逛着，以此为信仰：生命是循环的圆，并以从虚无缥缈的走神分心里获得乐趣为目的。
Italy idles in the belief that life is circular and objectives an illusory distraction from pleasure.
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