Forecasters in the United States can give an average warning time of 13 minutes before a tornado hits.

美国预报员平均能提前13分钟发出龙卷风警报。

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Forecasters in the United States can give an average warning time of 13 minutes before a tornado hits.

美国预报员平均能提前13分钟发出龙卷风警报。

youdao