n.爆发；喷发；出疹；长牙
A few days later, Vesuvius was in violent eruption. 几天以后，维苏威火山猛烈爆发了。
Each layer of color represents an eruption. 这一层颜色就代表一次喷发。
So eruption of volcanoes is one way of producing igneous rocks. 那么火山喷发是形成火山岩的一种方式罗。
