Thee students asked:can we make a projection line to the Equator line on a plane?

同学们又问了：我们可以在这个切面上做一个到赤道线的垂线吗？

youdao

And as the polar, a year only black and white and two days, such as the equator line, a year only the rain season two, a dry time be spun, fatigue and hopelessness became theme.

而如南北极，一年只有黑白两天，如赤道线，一年只有雨旱两季，时光一被拉长，疲劳和无望便成了主题。

youdao

The equator is an imaginary line around the middle of the earth.

赤道是一条假想的环绕地球腰部的线。

《牛津词典》

One line is the equator. It is an imaginary line around the widest part of the Earth.

VOA: special.2010.07.14

If there were no correlation between prosperity and distance from the equator, we would expect the green line to be centered at zero with random oscillations due to noise in the data.

FORBES: The correlation is there.