Dr MacKinnon says in some cases, alien species have been introduced to a country by people with good motives in mind, but they lead to disastrous results.
麦克·金南博士说，在某些情况下，向一个国家引进外来物种的人的动机是好的，但导致了灾难性的后果。
She describes Gerbert's geometrical speculations as "experimental" when the modern concept of experiment was alien to the medieval mind.
她形容尔贝特的几何学的推测是“实验性的”，而现代概念的实验是同中世纪的理智是格格不入的。
She describes Gerbert's geometrical speculations as "experimental" when the modern concept of experiment was alien to the medieval mind.
她形容尔贝特的几何学的推测是“实验性的”，而现代概念的实验是同中世纪的理智是格格不入的。
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