During atropicalyear the sun moves from Vernal Equinox to Vernal Equinox.
在一个回归年内，太阳从春分点转回到春分点。
2
This paper advocates that the six states of the dragon described in the hexagram of Qian are six celestial phenomena of the star of the green dragon in atropicalyear.
本文认为乾卦六爻爻辞所说的“六龙”各种状态是苍龙星在一个回归年中所运动的不同天象。
3
Cuba has atropical climate with year-round sunshine.