migration tube

例句：

1. 1. The migration tube is crucial for the survival of migratory birds.
   迁移管对于候鸟的生存至关重要。
2. 2.The construction of the migration tube has been a long-term project.
   迁移管的建设是一个长期项目。
3. 3. The migration tube was designed to facilitate the movement of animals during their seasonal migrations.
   迁移管的设计是为了促进动物在季节性迁徙期间的移动。