他们竭力将危机置于掌控之中，不仅是迫于危机蔓延的速度，还因为决策者和他们所服务的公众完全无法不了解这场危机的辐射范围和严重程度。
They have struggled to gain control not just because of the speed of contagion but also because policymakers, and the public they serve, have failed fully to grasp the breadth and depth of the crisis.
由于撞击造成的地震和海啸可能对沉积层造成严重的破坏，使得离散的岩层旋转混合在一起并完全打乱地质时间线。
Earthquakes and tsunamis that resulted from the collision could have wrought havoc on the sedimentary record, causing discrete strata to swirl together and completely scrambling time lines.
除少数例外，伴随而来的社会和经济动荡完全不像人们担心的那么严重。
With few exceptions, social and economic disruptions have been far less significant than feared.
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