专家称现在就像以前，灾难转变成大灾祸的风险取决于事发前的当地条件和灾后的反应。

Experts say that now as then, the risk that a disaster will turn into all-out catastrophe depends on both the local conditions before the event and the response afterward.

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像上周造成那么大规模破坏和伤亡的灾难，美国海岸经历过的实在差远了，但这并不是说北美就可以免遭这类灾祸。

Nothing even approaching last week's toll of death and destruction has ever visited U. S shores, but that doesn't mean North Amercia isn't vulnerable.

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