south tropical calm zone 南回归线无风带
Some parts of south China are located in tropical and subtropical zones while the northern part is near the frigid zone.
在云南南部，从热带亚洲植物区系到东亚植物区系的过渡与转变，显然发生在思茅莱阳河地区以北。
Origined from South America, planted in temperate zone and tropical belt in the world.
属茄科烟草属，原产南美洲，现广植于全世界温带和热带地区。
Most of the country in the temperate zone, although geographically the country stretches from the tropical and subtropical zones in the south to the frigid zone in the north.
中国大部分地区处于温带和亚热带，南部部分地区处于热带，北部部分地区则靠近寒带。
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