听力文本

This is Scientific American's 60-second Science, I'm Christopher Intagliata.
Antarctica is a lonely continent. But the Antarctic Peninsula, the little "tail" that juts out toward South America, is a hub of human activity. More than 50 scientific research stations are based there. And in a recent travel season, 42,000 tourists visited, mostly from cruise ships.
Problem is when humans go somewhere, hitchhikers come with—like a nonnative flightless midge, an insect that has already taken up residence in the peninsular region.
"And its biomass is greater than the biomass all the other invertebrates in the soil. It's already taking over the nutrient cycling in that environment."
Kevin Hughes is an environmental researcher with the British Antarctic Survey. He and a team of experts recently reviewed a list of 103 marine and terrestrial species that might be poised to take up residence on the continent. From that list, they pinpointed the 13 most likely to arrive, establish themselves and become invasive in the next decade.

At the top? Mussels, which stick to ships and could carpet shorelines and smother native species. Antarctic shores and shallow waters could also fill with crabs, which haven't existed in those habitats for millions of years.
"So the communities are just not used to these sorts of predators coming in. And the potential for crabs to chomp away at what's sitting on the seabed is quite a frightening prospect."
On land, the scientists flagged a mite, a springtail and several species of buttonweed plants as potential invaders. The full list is in the journal Global Change Biology.
"We have to remember that Antarctica is really one of the last great wildernesses we have on the planet. We want to keep this place pristine for scientific research. Because it's told us so much about how the world works; how climate works; how ecosystems can be put together; how they function. So it's just incredibly important that we just keep it as pristine as we possibly can."
But that task keeps getting more difficult. Because climate change is slowly thawing the "frozen continent," making it easier for invaders to gain a foothold.
Thanks for listening for Scientific American's 60-second Science. I'm Christopher Intagliata.

参考译文

这里是科学美国人——60秒科学系列，我是克里斯托弗·因塔格里塔iB&&%yd9&Ssak~a7]。
南极洲是一个孤独的大陆woyeQS7U5H-*。但南极半岛，这个伸向南美洲的“小尾巴”，是人类活动的中心dp6.aDdip^LA。那里有50多座科研站rLdi#JHhYd。在最近的旅游旺季，有42000名游客到访该半岛，其中大部分乘坐游轮抵达%(-s#@L;8Q|h0aAz|3[。
问题是，当人类去某个地方时，搭便车者也随之而来，比如非本土不会飞的蠓虫，这是一种已经在半岛地区定居的昆虫uBgNk~aCEo。
“其生物量比土壤中所有其它无脊椎动物的总生物量还要多pcmR=5i+c))u.。这种昆虫已经掌控了环境中的养分循环^z|*p.h!f%。”
英国南极调查局的环境研究员凯文·休斯说到|=EAj&~v9x。他和一个专家小组最近审查了一份名单，该名单包括103种可能会在南极大陆定居的海洋和陆地物种dQkpGaUFaF=8t。他们从名单中准确找到了未来十年最有可能到达、立足并成为入侵物种的13种生物7L3mw5jrJUKv。
排在首位的是什么？贻贝，这种生物粘在船上，可以覆盖海岸线，并让本土物种窒息死亡|E(oRFI;2TSH%d。南极海岸和浅水区也可能爬满螃蟹，这些螃蟹数百万年来都未在这里的栖息地存在过]HX,9ZlE#E&sewY。
“当地只是不习惯这种捕食者的到来tiDR[,g(1)HHUV.M。螃蟹可能会吞食海床上的生物，这一场景相当可怕WKqC&^mrRPF5。”
在陆地，科学家将螨虫、跳虫和多种纽扣草族植物标注为潜在入侵者axMO5DNlsNa)a。完整的名单刊登在《全球变化生物学》期刊上Kax@*,0p%=MbMhRQL@5。
“我们必须记住，南极洲是地球上仅存的大片荒野之一x9R1t1NE)Yq。为了科学研究，我们要保持这个地方的原始状态)XjXWs4GnPS[*q。因为这里告诉了我们如此多的信息，比如世界运转方式；气候运作形式；生态系统如何组合及运行y9LMFTkG4kaI0)(。因此，尽我们所能保持这里的原始纯净极为重要YM@BobE^zaEp;%&v。”
但这项任务正愈加艰难y,z8i=bC7UM=IcTb=bA8。因为气候变化正在慢慢融化这片“冰冻大陆”，使入侵者更容易站稳脚跟lG~~&YKTaE89+fr)q。
谢谢大家收听科学美国人——60秒科学|2w]JJLVEWbLtx9ad=。我是克里斯托弗·因塔利亚塔YO.iW8c]z3ij,jQ)#fB。

译文为可可英语翻译，未经授权请勿转载！

重点讲解

重点讲解：
1. take over 占领，接管，控制；
The general commanded his men to take over the city.
将军命令他的部下夺取这座城市UeQmH4uShpH=-Ge。
2. be poised to do sth. 作好一切准备的；随时准备行动的；
Britain was poised to fly medical staff to the country at short notice.
英国随时准备把医护人员空运到该国OrH4t~ms._i#8To@*。
3. stick to 黏附；附着在；
The soil sticks to the blade and blocks the plough.
土粘在犁铧上，卡住了犁5v,y4fYKbS8poVR&Y2N2。
4. be used to sth./doing sth. 习惯于；
I'm used to getting up early.
我习惯早起N-Mw3lU%0P(EN。