day-night observation

例句：

1. 1. The scientist conducted a day-night observation of the stars to gather data for his research.
   科学家对星星进行了日夜观察，以收集研究数据。
2. 2.During the night, the astronomer made an observation of the moon's phases.
   在夜晚，天文学家观测了月亮的相位。
3. 3.The team decided to conduct a day-night observation to study the effects of pollution on wildlife.
   团队决定进行日间和夜间的观察，以研究污染对野生动物的影响。