An active volcano may erupt at any time.

活火山会随时喷发。

《牛津词典》

Located in southern Italy, Etna is the highest active volcano in Europe.

埃特纳火山位于意大利南部，是欧洲最高的活火山。

youdao

Doing that in many of the forests of the western US is like building homes on the side of an active volcano.

在美国西部的许多森林里那样做就像在活火山边上建房子一样。

youdao

Visitors can see how an active volcano adds mass to the island.

VOA: special.2010.09.08

"Because there are only a couple of previous records of eruption at this particular volcano, it is difficult to judge either how long the activity will go on there, or how long the volcano might then be dormant before it goes active again."

VOA: standard.2010.04.15

For two weeks Merapi, Indonesia's most active volcano, has been spewing forth its contents.

ECONOMIST: A capricious volcano, but fears ease of another Pompeii

Mt Cotopaxi is the highest active volcano in Ecuador and one of the highest in the world.

BBC: Scaling the Ecuadorean Andes

The island has an active volcano, Mount Pelee, which erupted in 1902, razing the town of Saint-Pierre and killing its 30, 000 residents.

BBC: Martinique profile