Instead of lava, ash, and sulfur dioxide, these volcanoes spew mud and methane.

这里的火山喷涌出的不是岩浆、火山灰和二氧化硫，而是泥浆和甲烷。

youdao

The lake, named after the swarms of gnats that breed around it, is surrounded by wetlands and volcanic landforms, including lava fields, lava pillars, volcanic cones, and boiling mud flats.

这座湖以其生长在四周的成群蚊蚋而命名，身处湿地和多种火山地貌之中，如熔岩荒野，熔岩柱，火山锥和沸腾的泥潭等。

youdao

These are not the lava-spewing kind, but vents from which the earth emits small amounts of gas and mud.

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