meridian
柯林斯词典
1. N-COUNT A meridian is an imaginary line from the North Pole to the South Pole. Meridians are drawn on maps to help you describe the position of a place. 经线
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1. N-COUNT A meridian is an imaginary line from the North Pole to the South Pole. Meridians are drawn on maps to help you describe the position of a place. 经线