N → a variant spelling of cola nut
By the late 19th century, kola nuts were being shipped by the tonne to Europe and the US.
到19世纪末，可乐果被成吨成吨地运往欧洲和美国。
Historian Paul Lovejoy relates that the cultivation of kola nuts in West Africa is hundreds of years old.
历史学家保罗·洛夫乔伊提到，在西非，可乐果已有数百年的种植历史。
In West Africa, people have long chewed kola nuts as stimulants, because they contain caffeine that also occurs naturally in tea, coffee, and chocolate.
在西非，人们长期以来都咀嚼可乐果作为兴奋剂，因为它们含有在茶、咖啡和巧克力中天然存在的咖啡因。
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