除不平等外的其他因素和这本书里描述的问题关联性更强。
Factors other than inequality are often more strongly correlated with the problems described in the book.
如紫色花的亚洲牡丹和草莓番石榴等外来物种，威胁着如无刺玫瑰和树蕨等脆弱的夏威夷本土物种。
Invaders such as purple-flowered Asian melastome and strawberry guava threaten delicate Hawaiian natives such as thornless roses and tree ferns.
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