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1. Oxford Dictionary

   line of longitude

   • n.
     a notional semicircle of constant longitude on the earth's surface, running from one terrestrial pole to the other; a meridian

   • noun: line of longitude, plural noun: lines of longitude

2. • 釋義

   n.

   名詞

   • 1. a notional semicircle of constant longitude on the earth's surface, running from one terrestrial pole to the other; a meridian the ship and the storm were both now on the same line of longitude