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volcanism ['vɔlkənɪz(ə)m] n
gen.	火山活动〔作用，现象〕
agric.	火山作用 (volcanismus)
hydroel.st.	火山活动; 火山作用; 火山现象
volcanism The processes by which magma and its associated gases rise into the crust and are extruded onto the Earth's surface and into the atmosphere n
environ.	火山活动 (岩浆和伴生气体上升进入地壳，并被挤压出地球表面，进入大气层的过程。)

volcanism: 18 phrases in 7 subjects

Desert science	2
Earth sciences	2
Ecology	1
Engineering geology	1
Explosives and Explosive Ordnance Disposal	1
Oil / petroleum	5
Technology	6