animal migration

• 动物的迁移

animal migration的用法和样例：

例句

1. Theirs is probably the longest migration flight.
   这也许是最远的迁移飞行。
2. Migration of the seismic activity is found before a big event.
   发现了大震前地震活动性的迁移。
3. I freely admit the former existence of many islands, now buried beneath the sea, which may have served as haltingplaces for plants and for many animals during their migration.
   我直率地承认，从前曾存在过许多岛屿可作为植物和许多动物迁移中歇足之地，现在都已埋在海下了。