这些鸟每年冬天都会迁徙到南方。
These birds ___migrate south for the winter every year.
随着科技发展，人们的工作方式逐渐从办公室迁移到了线上。
With technological advances, people's work styles ___migrated from offices to online platforms.
这些鸟儿正在迁徙。
These birds are ___migrating.
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