migration

The annual migration of wildebeests across the African savanna is a spectacular sight.

(Chinese) 角马每年跨越非洲大草原的大迁徙是一个壮观的景象。

Economic hardship caused a mass migration of workers from the rural villages to the coastal cities.

(Chinese) 经济困难导致了工人从农村村庄向沿海城市的大规模移居。