mass migrations

• 大规模的迁移

mass migrations的用法和样例：

例句

1. This year's migrations south have already started, and, especially after the torching of Abyei, everyone is preparing for more trouble.
   今年往南的迁移已经开始，尤其因为阿卜耶伊的大火之后，每个人都在为更多暴力做准备。