The World Heritage Committee said increased tourism,immigration and invasive species threaten the animals of the Galapagos.

VOA: special.2009.12.16

They might have come from two completely different places, from two completely different species from different parts of the world, and they're put together in a new way and that's why it's called recombinant DNA.

它们也许来自两个完全不同的地方,来自世界上不同地区的两个完全不同的物种,以新的方式组合在一起,所以它被称作重组DNA

耶鲁公开课 - 生物医学工程探索课程节选

That species was down to twelve purebred individuals after World War Two."

VOA: special.2010.06.22

"I think the one story that inspired this book was meeting a wonderful man called Don Mertin in New Zealand and he explaining to me how he had saved a species of bird called a Black Robin when there were just seven individuals left in the world of which only two were female and only one of whom was fertile."

VOA: special.2009.11.18

"She's become unstable." "This is the disaster everyone warns about: a new species set loose in the world."

VOA: standard.2010.06.09