赤道的英文：
equator

the equatorial horizontal parallax
赤道地平视差

Declination: angular distance of a celestial object north or south of the celestial equator.
赤纬：天体在北或南方向偏离天赤道的角距离。

equatorial climate zone
赤道气候带

equatorial countercurrent
【海】赤道逆流

equinoctial line [ circle ]
天球赤道,昼夜平分线

The equator is an imaginary line.
赤道是一条实际上并不存在的线。

The equatorial portion should tend to swing outward.
近赤道的部分会有向外凸出的趋势。

Gorilla are the largest of the anthropoid apes native to the forests of equatorial Africa.
大猩猩是栖居在赤道非洲的最大的类人猿。

The nearer you get to the equator, the hotter it is.
越靠近赤道，天气就越热。

It was a sensuous, tropic night
那是纵情于声色之乐的赤道之夜。

an integral equation
积分方程

Tom，please expand this equation.
汤姆，请你展开方程式。

The equations are written in rectangular coordinates.
这些方程是在直角座标系中写出的。

The professor wrote an equation on the blackboard.
教授在黑板上写了一个等式。

The equations generated, however, are not linear.
但所形成的方程不是线性的。