If the sun were just a tiny point of light and Earth had no atmosphere, then day and night would each be exactly 12 hours long on a spring equinox day.
如果太阳只发出很小一点的光,并且地球周围不存在大气层,那么在春分这天,昼夜等长,都是12个小时。
At the spring equinox, mountain peach tree branches, 1000 million as the flame generally bloom.
到了春分,山上山下的桃花,千树万枝就像火焰一般地怒放了。
应用推荐