简而言之，羽毛的进化史是伴随着飞行的进化同时发生的。
In short, the evolution of feathers would have happened along with the evolution of flight.
伴随的同时发生或共存的；
这种急剧下跌与风险偏好的冻结是同时发生的，伴随着欧元的下挫，信贷息差大幅飙升，给借款人、特别是银行造成了压力。
The sharp fall has coincided with a freeze in risk appetite . Credit spreads have surged in lock step with the euro's slide, deterring borrowers, in particular banks.
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