Warning flags at stations throughout town, he said, announce the risk level of an eruption, from green, indicating low danger, to red, meaning an eruption is imminent.
他表示，观测站的预警标识在戈马城到处都有，这些标识会显示喷发的风险等级，绿色代表低危险性，红色则代表喷发即将来临。
The eruption of the volcano affected air travel on a global level.
那座火山的喷发影响了全球的航空运输。
Scientists in the Philippines have raised the alert level for the volatile volcano Mount Mayon, amid fears of an imminent eruption.
菲律宾科学家对即将爆发的活火山马荣火山提高了警戒程度。
And the eruption grain that different volcanic gush gives out is different, coarse level is different, to the influence of the plane degree also differs.
而不同的火山喷发出的火山灰颗粒不同，粗糙程度不同，对飞机的影响程度也就不同。
And the eruption grain that different volcanic gush gives out is different, coarse level is different, to the influence of the plane degree also differs.
而不同的火山喷发出的火山灰颗粒不同，粗糙程度不同，对飞机的影响程度也就不同。
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