Fallout from a nuclear explosion may be carried by wind currents for hundreds of miles if the right conditions exist.
如果条件存在，核爆产生的放射性尘降物会随风漂移数百英里。
Wind speed and direction will affect arrival time of fallout; precipitation may wash fallout from the atmosphere.
风速和风向会影响放射性尘粒到达的时间；冰雹则能带出空气中的放射性尘降物。
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