1. 經(jīng)線，緯線，經(jīng)緯度地圖或地球儀上的經(jīng)緯線或經(jīng)緯度
   A degree or circle of longitude or latitude drawn on a map or globe.
2. 緯線，緯度圈與赤道平面平行且環(huán)繞地球用來(lái)表明緯度高低的許多假想線中的任意一條
   Any of the imaginary lines representing degrees of latitude that encircle the earth parallel to the plane of the equator.
3. （天球的）回歸線代表太陽(yáng)經(jīng)過(guò)的最北視界線與最南視界線的兩條相應(yīng)的天球緯線
   Either of two corresponding parallels of celestial latitude that are the limits of the apparent northern and southern passages of the sun.

線的英語(yǔ)翻譯：