Initially unrestrained by predators of their own, foreign predators are likely to be able to multiply rapidly and overwhelm intended targets.

外来掠食者最初不受自身掠食者的限制，它们可能会迅速繁殖并击溃预定目标。

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Mosquitoes multiply rapidly in summer.

蚊子在夏天繁殖得很快。

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They multiply rapidly—some species double their biomass in as little as five hours.

硅藻繁殖迅速，有些硅藻物类仅5个小时就能让其生物量翻一番。

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The new bugs multiply rapidly and take over the lower intestine, driving C. difficile away.

ECONOMIST: The human microbiome

The snails have another trait in common with rats: They can multiply very rapidly -- and grow to adulthood in a year, Feiber says.

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She first injects a sample of "wild virus"-- in this case, H1N1 virus she got from the CDC, originally culled from a child who was infected in California this spring -- and then injects a sample of another flu strain that's known for its ability to rapidly multiply in eggs.

CNN: Candidate virus for H1N1 vaccine arrives at CDC