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1. The sun sets at the equator, marking the beginning of the day for the entire planet.
太阳在赤道落下,标志着整个星球开始新的一天。
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2. The moon's phases are a reminder of the boundary between night and day.
月亮的相位提醒我们日夜的界限。
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3. The International Date Line is a line drawn across the Earth to separate the date in different countries.
国际日期线是横跨地球的一条线,用来区分不同国家的时间。