tropic of Capricorn

tropic-of-capricorn的词性：
n.（名词）

1. The parallel of latitude 23⁼27&S{￠} south of the equator, the southern boundary of the Torrid Zone, and the most southerly latitude at which the sun can shine directly overhead.
南回归线，冬至线：即南纬23⁼27&S{￠}的纬线，位于赤道以北，是热带地区的南边界，太阳垂直照射的最南端