Cultivation of high-tannin sorghum in Africa is associated with herbivore threat from red-billed quelea, but also with reduced sensation of bitterness in humans.

中文翻译：

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苦的时候比较好。

在非洲种植高单宁高粱与红嘴奎利亚的食草动物威胁有关，但也与人类的苦味感降低有关。