night movement

例句：

1. 1.Many nocturnal animals are active during the night.
   许多夜行动物在夜间活跃。
2. 2.The nocturnal creatures often emerge from their burrows at dusk.
   夜行生物通常在黄昏时分从洞中出现。
3. 3. The nocturnal migration of birds is fascinating to watch.
   鸟类的夜间迁徙令人着迷。