Most birds are diurnal, meaning they are active during the day.

大多数鸟类是昼行性的，这意味着它们在白天活动。

The plant exhibits diurnal leaf movements, opening in the morning and closing at night.

这种植物表现出昼夜叶片运动，早上张开，晚上闭合。

The hospital staff conducts diurnal rounds to check on patients.

医院工作人员进行每日查房以检查病人。

The weather forecast predicts diurnal temperature fluctuations.

天气预报预测每日温度波动。