Thus the work which vulcanologists undertake, monitoring volcanoes and their seismic activity, is crucial to saving lives.
因此，火山学专家的任务，就是观测火山以及它的地震活动，这对救人来说至关重要。
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Vulcanologists say the ash could cause problems to air traffic for up to six months if the eruption continues, but even if it short-lived the financial impact on airlines could be significant.