1.太阳正下面的;赤道的
2.日光下的,现世的
1.located directly below the Sun on the Earth's surface when the Sun is at its highest point
2.located in the equatorial region that lies between the tropics of Cancer and Capricorn
1.New features of electron diffusion regions observed at subsolar magnetic field reconnection sites
在日下磁场重联地点观测到的电子扩散区域的新特征