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- It's a gaze of day and night, and a hopeless wait forever. 这日夜的凝望,却是无望的永恒等待。
- Flowering in response to relative length of day and night. 植物开花对昼夜。
- Human biological rhythms are related to the natural cycle of day and night. 人的生物节奏与昼夜的自然循环有关。
- Human biological rhythm is related to the natural cycle of day and night. 人的生物节奏与昼夜的自然循环有关。
- The enemy kept up their bombardment day and night. 敌军一直日夜不停地狂轰滥炸。
- They disturb me at all hours of the day and night. 他们日夜不断地打扰我。
- I wish he'd desist from entertaining his friends at all hours of the day and night. 但愿他别再昼夜不分地招待他的朋友。
- The bus service runs day and night. 公共汽车日夜都有班次。
- He thought of his lover day and night. 他日日夜夜思慕着他的情人。
- Call upon the lords of day and night and invoke the incantation that blurs the laws of time. 要求阁下日夜并且祈求弄脏时间法律的咒语。
- Many animals and plants are sensitive to the length of day and night, and their biochemical activities respond to it. 许多动物与植物对白天和夜晚的长度敏感，且他们的生物化学性的活动会回应它。
- The revolution of the earth causes day and night. 地球的自转形成白天和夜晚。
- The axis of the earth is tilted 23.5 degrees. Because of this tilt, the hours of day and night are not exactly 12. 地球的轴线倾斜23.;5度。因为这个倾斜，白天和夜晚的小时数并不全是12
- These rhythms take place within the external rhythms of day and night, seasons, years and planetary influences. 当然这些是和日月交替，季节变化，以及年度变化，还有星系的影响是分不开的。
- News reporters camped upon his doorstep day and night. 一些新闻记者日夜在他门口纠缠不走。
- I had a stubborn cold and coughed day and night. 我得了很难治的感冒，日夜咳嗽。
- I will sit by her bedside day and night. 我会日夜守在她的床边。
- They labored day and night in wretchedness. 他们在痛苦中夜以继日地劳累。
- Photoperiodism A biological response to the length and timing of day and night, making it possible for an event to occur at a particular time of year. 光周期诱导：植物只需要一定时间适宜的光周期处理，以后即使处于不适宜的光周期下，仍然可以长期保持刺激的效果，这种现象称为光周期诱导。
- It's affected by the factors which include personal characteristics, fatigue, accident distributing of day and night and of months, and entironment. 其影响因素包括个性特征、疲劳因素,事故的昼夜分布以及月份分布和自然环境因素等。
