At this time, the sunlight shines vertically on the equator, equally dividing the day and night in both the southern and northernhemispheres.
在这个时候,太阳直射赤道,南北半球昼夜平分。
2
These preliminary results give us a possible hint to study some global tectonic phenomena, e. g. the asymmetry of the southern and northernhemispheres and the earth's differential rotation.