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英语单词“diurnal”的意思是昼夜的，日间的，读音为/daɪˈɜːn(ə)l/。
例句：
1. The diurnal bird sings sweetly in the morning and evening. 这种昼鸟早晚鸣叫，歌声甜美。
2. The diurnal animals are active during the day. 昼行动物在白天活动。
3. The diurnal cycle of light and dark is essential for most animals. 光和暗的昼夜周期对大多数动物来说是至关重要的。
4. The diurnal animals are active during the day and sleep at night. 昼行动物白天活动，晚上休息。
5. The diurnal bird of prey hunts at dawn and dusk. 昼行猛禽在黎明和黄昏时狩猎。
6. The diurnal butterfly is a common sight in the countryside. 在乡间，昼行蝴蝶是很常见的。
7. The diurnal bats are active during the day and sleep at night. 昼行蝙蝠白天活动，晚上休息。
8. The diurnal flowers open in the morning and close at night. 昼行花在早晨开放，晚上闭合。
9. The diurnal turtle comes out to bask in the sun during the day. 昼行龟在白天会出来晒太阳。
10. Many animals have a regular daily cycle of activity and rest. This is known as diurnal rhythm. 许多动物有一个固定的日常活动和休息周期，这被称为昼夜节律。
以上就是“diurnal”在句子中的用法和含义，希望对你有所帮助。
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