Increasing nutrient contents may also result in an increase in more undesirable species of aquatic life.

日益增加的富养成分也可能造成更多意想不到的水生命的激增。

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This undesirable result would be a direct consequence of differences among species.

这种不合意的结果将是物种间区别的一个直接后果。

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The adaptive ability of wild species in Kunming is promising, and that of the species from high altitude areas is undesirable.

昆明野生树种适应性较好，而原产高海拔地区的树种适应性较差。

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The wing patterns of H. heurippa individuals make them undesirable as mates for members of their parent species, but attractive to each other - reinforcing patterns of mating that lead to a new species.

BBC: NEWS | Science/Nature | Two species become one in the lab