diurnal

植物的光合作用通常遵循昼夜节律。

Plants typically follow a ___diurnal rhythm in their photosynthesis.

这种鸟有昼行性，每天黎明时分就开始活动。

This bird has a ___diurnal pattern, becoming active at dawn every day.

蝴蝶是昼行性昆虫，白天在花丛中飞舞觅食。

Butterflies are ___diurnal insects that fly among flowers during the day.