magma activity的用法和样例：
例句
- The formation of the geothermal area has related with structure magma activity and depths structure variation since the Mesozoic-Cenozoic Era.
易家河地热区的形成主要与中新生代以来深层构造变异带的构造岩浆活动有关。 - Granites at the middle Variscian period are the largest scale magma activities on the Caledonia foldbelt inthe west Tianshan mountain.
海西中期花岗岩是西天山加里东褶皱带内规模最大的一次岩浆活动。
