late 14c., from Medieval Latin aequator (diei et noctis) "equalizer (of day and night)," agent noun from Latin aequare "make equal" (see equate). When the sun is on the celestial equator, twice annually, day and night are of equal length. Sense of "celestial equator" is earliest, extension to "terrestrial line midway between the poles" first recorded in English 1610s.
雙語例句
1. GPS operates best near the equator.
全球定位系統在赤道附近性能最好。
來自柯林斯例句
2. The equator is an imaginary line around the middle of the earth.
赤道是一條假想的環繞地球腰部的線。
來自《權威詞典》
3. Singapore is near the equator.
新加坡位于赤道附近.
來自《簡明英漢詞典》
4. The United States is north of the equator.
美國位于赤道以北.
來自《現代漢英綜合大詞典》
5. All the planets orbit the Sun in roughly the same plane, round its equator.