在过去的几百年里，不管是有意地还是无意地引进新物种，都暴露出一些问题。

Introductions of new species, both accidental and deliberate, over the past few centuries show the problem.

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科研人员好意引进新物种以解决当地问题，往往一波未平一波又起。这种情况已经屡见不鲜。

THERE have been several cases in which well-meaning boffins have introduced a new species to overcome one problem only to create another.

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现下一新纽西兰章著重于引进到那个国家的物种的捕食问题。

Now a new NZ chapter focuses on predation problems of the species introduced to that country.

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