名词
中文翻译：经线
同义词：
['prime meridian', 'equator']
例句：
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1.The prime meridian is the line that divides the Earth into two equal halves.
本初子午线是将地球分为两个相等部分的线。
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2. The equator is the plane of the Earth's surface that passes through the center of the planet.
赤道是地球表面的平面，穿过行星的中心。
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3. The prime meridian is used to determine longitude, which is the distance from the Prime Meridian to a point on the Earth's surface.
本初子午线用于确定经度，即从本初子午线到地球表面某点的距离。