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trop·ic AHD[trŏpʹĭk] D.J.[ˈtrɒpɪk]K.K.[ˈtrɑpɪk]n.（名词）abbr. trop.【缩写】 Jerry Malone- Either of two parallels of latitude on the earth, one 23°27′ north of the equator and the other 23°27′ south of the equator, representing the points farthest north and south at which the sun can shine directly overhead and constituting the boundaries of the Torrid Zone.回归线：地球上分别位于北纬23°27′和南纬23°27′的两条平行纬线，代表太阳可直射的最北端和最南端，并由热带分界线构成
- Tropics or tropics The region of the earth's surface lying between these latitudes. Tropics 或 tropics 热带地区：位于上述两纬度之间的地球表面地区
- Astronomy Either of two corresponding parallels of celestial latitude that are the limits of the apparent northern and southern passages of the sun.【天文学】 （天球的）回归线：代表太阳经过的最北视界线与最南视界线的两条相应的天球纬线
adj.（形容词）abbr. trop.【缩写】- Of or relating to the Tropics; tropical.热带的：热带的与热带有关的；热带的
- Middle English tropik 中古英语 tropik
- from Old French tropique 源自 古法语 tropique
- from Late Latin tropicus 源自 后期拉丁语 tropicus
- from Latin [of a turn] 源自 拉丁语 [转折的]
- from Greek tropikos 源自 希腊语 tropikos
- from tropē [a turning] * see trep- 源自 tropē [转折] * 参见 trep-
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