Flying through a cloud of volcanic ash poses a significant hazard to airlines.

飞过密布火山灰的云层，对航空公司构成了极大的威胁。

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The natural damming of rivers by landslides is a significant hazard in many areas. Landslide damming is particularity common in mountainous regions.

崩滑堵江事件在世界范围内，尤其在山区广泛存在。

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Initial nuclear radiation will be a significant hazard with smaller weapons, but the fallout hazard can be ignored as there is essentially no local fallout from an air burst.

相比小型武器，早期核辐射的危害是很严重的。但是放射性尘降的危害可被忽略，因为空中爆炸基本上不会给地面带来尘降。

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The alert, initially issued by Southwest Airlines and reissued Wednesday by the airline's pilot association, warned there was a "potentially significant hazard" concerning the instrument landing system's glide slope guidance signal for runway 23.

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"While it's true that pilots are safe, locked behind cockpit doors, these dangerous items still pose a significant hazard to the flight crew, other passengers, and even the integrity of the plane, " said Schumer.

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According to Edison documents, members of the public can request a hearing on the license amendment, but if NRC staff finds there is no significant hazard, the hearing can be held after the amendment is approved.

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