Ragwort was accidentally introduced to New Zealand in the late nineteenth century and, like so many invading foreign species, quickly became a pest.

19世纪末，狗舌草被偶然引入新西兰，像许多入侵的外来物种一样，它很快就变成了一种有害生物。

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The other thing we're doing is getting rid of some of the foreign species that are growing in the gardens and putting back some native plants and trees.

我们正在做的另一件事是除掉生长在花园里的一些外来物种，并种回一些本地植物和树木。

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Theintroduction of foreign species is a global phenomenon.

引进外来物种是一种全球性的现象。

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But the snakes are a foreign species, native to Southeast Asia.

VOA: special.2009.06.30

In fact, today there are more foreign plant species on the islands than there are native plants.

VOA: special.2009.04.22

The fashion then was for collection and growing foreign species so the Spanish invaders going native was not seen as a problem.

BBC: NEWS | UK | Northern Ireland | Gardeners urged to repel boarders

Some Americans may view this invasion of a foreign species as somehow fitting and just, given the takeover of so many American acres by invasive Japanese weeds like kudzu and knotweed.

FORBES: Long Reach Of The Largemouth

He said it was not clear if the bittern was one of the breeding birds from Leighton Moss or one of the species' foreign visitors, which come to Britain to overwinter and escape colder weather on the continent.

BBC: Rescued rare bird to be released