adj.白天的，日间活动的，昼行性的，周日的
n.日记，每日祈祷书

Diurnal animals are active during the day and rest at night.
昼行性动物在白天活动，夜间休息。
The diurnal temperature range in this region can be quite significant.
这个地区的日温差可能相当大。
Plant transpiration usually increases during diurnal sunlight hours.
植物的蒸腾作用通常在白天阳光照射时段增强。
The diurnal cycle of the tides is caused by the gravitational pull of the moon.
潮汐的日周期变化是由月球的引力引起的。
Diurnal birds, like sparrows, start their activities with the first light of dawn.
像麻雀这样的昼行鸟，在黎明初现时就开始它们的活动。
The diurnal variation in atmospheric pressure is often noticeable in mountainous areas.
气压的日变化在多山地区通常是显而易见的。
Keeping a diurnal routine helps maintain a healthy sleep-wake cycle.
保持日间规律有助于维持健康的睡眠-觉醒周期。
The diurnal rhythm of flowering plants attracts pollinators during daylight hours.
开花植物的日间节律在白天吸引传粉者。
The study recorded the diurnal behavior patterns of meerkats in their natural habitat.
研究记录了猫鼬在其自然栖息地的日间行为模式。
Humans have largely become a diurnal species due to our reliance on daylight for vision and productivity.
由于依赖日光进行视觉和提高生产力，人类已基本成为昼行物种。