actual true migrated mass 实有真迁移质量
After the whole typhoon landed, the southwest airflow rebuilt, and a mass rice brown planthopper migrated to the north.
台风整体登陆后，西南气流的再次建立，造成褐飞虱的大量北迁。
The melt extracted a mass of metallic elements gold and silver during its reaction with mantle peridotite when it migrated upward to the mantle wedge;
熔体与地幔楔橄榄岩及幔源熔体的相互作用（金属的萃取）使熔体富集成矿元素；
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