昼夜zhòuyèTop 20000Meanings1. day and night2. period of 24 hours3. continuously, without stopCharacters used昼daytime夜nightExamples1这zhè段duàn时间shíjiān昼夜zhòuyè温差wēnchā很hěn大dà。There is a large temperature difference between day and night during this period of time.