magma activity的用法和樣例：
例句
- The formation of the geothermal area has related with structure magma activity and depths structure variation since the Mesozoic-Cenozoic Era.
易家河地熱區的形成主要與中新生代以來深層構造變異帶的構造岩漿活動有關。 - Granites at the middle Variscian period are the largest scale magma activities on the Caledonia foldbelt inthe west Tianshan mountain.
海西中期花崗岩是西天山加里東褶皺帶內規模最大的一次岩漿活動。
