1·The main island is an active volcano.
群岛的主岛是一座活火山。
2·On the other hand, there would seem to be a major problem with measuring carbon dioxide at Mauna Loa: the mountain is an active volcano.
另一方面,在莫纳罗亚山测量二氧化碳的一大问题似乎在于这是一座活火山。
3·Vesuvius isn't the only active volcano threatening this densely-populated area.
维苏威火山并不是威胁这个人口稠密地区的唯一活火山。
4·At nearly 11,000 feet (3,353 meters), Mount Etna is Europe's highest active volcano.
埃特纳火山海拔高度近1.1万英尺(约合3353米),是欧洲境内最高的活火山。
5·Mount Vesuvius is an active volcano.
维苏威火山是座活火山。