... region 指在地理上有天然界限或有自己特色的一个单位，或自治区等行政单位，也可指领域 tropical regions of South America 南美的热带地区 a residential zone 居住区 ...
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Yellow fever is endemic in tropical regions of Africa and South America, where 44 countries (33 in Africa and 11 in South America) are considered to be at risk.
黄热病在非洲和美洲的热带地区流行，据认为44个国家(33个在非洲，11个在南美洲)存在风险。
Cocona fruit is another tropical fruit found in the mountainous regions of South America.
可可果是在南美洲山区发现的别一种热带水果。
Indica rice thrives in tropical regions of Asia and South America, raising worldwide production more than 20 percent by 1970.
籼稻在亚洲和南美洲的热带地区的蓬勃发展，使1970年全球产量增加了百分之二十。
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