Fire tornadoes can last for an hour or more, and they can't be extinguished directly, Forthofer said.
火龙卷可以持续一个小时或以上，而且它们不能被直接扑灭，福托菲尔说。
The temperature inside the core of a fire tornado can reach up to 2,000 degrees Fahrenheit (1,093 degrees Celsius)—hot enough to potentially reignite ashes sucked up from the ground, Forthofer said.
火龙卷的内部核心温度可达2，000华氏度（1，093摄氏度），其高温足以将潜在的灰烬从地面吸入重新点燃，福托菲尔说。
The temperature inside the core of a fire tornado can reach up to 2,000 degrees Fahrenheit (1,093 degrees Celsius)—hot enough to potentially reignite ashes sucked up from the ground, Forthofer said.
火龙卷的内部核心温度可达2，000华氏度（1，093摄氏度），其高温足以将潜在的灰烬从地面吸入重新点燃，福托菲尔说。
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