其次，它在有火的情况下熔化，但是当你吹灭火焰的时候，它迅速冷却并融合，防止有灰掉落。
Second, it melts under fire but cools and fuses quickly when you blow the flame out, keeping ash from falling.
禁航是因为涡轮发动机产生高温，火山灰会熔化玻璃和削弱发动机。
The flight ban was imposed because in the high temperatures of an engine turbine, ash can turn to molten glass and cripple the engine.
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