赤道

例句：

1. 1.The Earth's axis is tilted at about 23.5 degrees to the sun, which is why we have seasons on the equator.
   地球的轴倾斜大约23.5度，所以赤道上有季节变化。
2. 2. The equator is the line that separates the Northern and Southern Hemispheres.
   赤道是区分北半球和南半球的界线。
3. 3. The equator is a place where the sun never sets, making it a unique spot for stargazers.
   赤道是一个太阳永不落山的地方，对于观星者来说是个独特的地方。