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。
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。
Some parts of south China are located in tropical and subtropical zones while the northern part is near the frigid zone.
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