恶劣的天气会蒙蔽雷达，且并不是所有的火山都在合适的设备范围内。
Radar can be blinded by bad weather, and not all volcanoes are within range of suitable equipment.
拥有这些设备的人主要用它们来听音乐、查看天气和设置计时器。
People who have these devices use them mainly for listening to music, checking the weather, and setting timers.
但是，雷达可以受恶劣天气蒙蔽，也并不是所有的火山都在适当的设备范围内。
But radar can be blinded by bad weather, and not all volcanoes are within range of suitable equipment.
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