名词
中文翻译：日界线日
同义词：
['sidereal day', 'sidereal day of the year例句：1. The sidereal day is when the Earth and the Moon are closest together.（日界线日是地球和月球距离最近的日子。）']
例句：
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1. The sidereal day is when the Earth and the Moon are closest together.
日界线日是地球和月球距离最近的日子。
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2. The sidereal day is also known as the "New Moon" or "Full Moon" phase.
日界线日也被称为新月或满月阶段。
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3. During the sidereal day, the Earth's shadow cast by the Moon covers a larger part of the planet.
在日界线日，月球的地球影子覆盖了地球更大的部分。