单词 | MERIDIAN |
释义 | Imaginary north-south semicircle crossing the earth’s poles, and intersecting the equator and all latitude baselines at right angles. Each meridian aligns in a north-south direction with its end-points converging at the north and south poles. Meridian lines are one of the reference point coordinates along with baselines in the land surveying grid system to locate any point on earth. Also known as longitude. |
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