PTE听力口语练习 – 科学60秒 – Fly Pollinators

PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书(PLUS,Testbuilder, OG)之外

就没有题了。很多英语基础不是很扎实的同学很难找到练习材料。悉尼文波雅思PTE培训学校专门为澳洲,尤其是悉尼、墨尔本的PTE考生准备了适合PTE听力阅读练习的科学60秒。各位PTE同学可以练习PTE听力中的summarise spoken text和PTE口语中的retell lecture,PTE听力口语-科学60秒-Frosty Moss练习记笔记技巧和复述。废话少说,下面开始:


 

听力内容:

60秒科学节目(SSS)是科学美国人网站的一套广播栏目,英文名称:Scientific American – 60 Second Science,节目内容以科学报道为主,节目仅一分钟的时间,主要对当今的科学技术新发展作以简明、通俗的介绍,对于科学的发展如何影响人们的生活环境、健康状况及科学技术,提供了大量简明易懂的阐释。

 

This is Scientific American — 60-Second Science. I’m Christopher Intagliata.

The Greenland High Arctic is a bare, sparse place. Rather than tall trees, it has tundra—ground hugging vegetation—and rugged, Lord-of-the-Rings-style vistas. “Well I don’t know, it’s not exactly New Zealand, but kind of similar landscape.”

 

Mikko Tiusanen, an ecologist at Helsinki University in Finland. “The winter season is like six, seven months. So everything basically happens during the short summer season.” Including the white-yellow bloom of mountain avens, a hardy arctic shrub. “Even though it’s small it can be over 100 years old. It’s pretty good at surviving harsh conditions.”

 

Tiusanen and his colleagues set out to census which of the many local insects visit mountain avens by summer, and help with pollination. So they planted 2100 sticky flower lookalikes, as traps, and identified stuck visitors by their DNA.

 

Two-thirds of all local insect species visited. But it was one particular fly, a relative of the humble housefly, that showed up most often in those spots where the tundra shrubs had successfully set seed. Meaning more flies appeared to be a good thing for the avens. The study appears in the Proceedings of the Royal Society: B.

 

Here’s the bad news: a 2013 study found that the Arctic flowering season is shortening. The numbers of fly pollinators is down, as is the the number of visits by these fly pollinators. Which could be bad for mountain avens—and beyond. “One could expect that also the other pollinators and flower visitors visiting the mountain avens could get more uncommon and even become extinct in the long run.” Meaning “shoo fly” could spell trouble for the life of the tundra.

 

Thanks for listening for Scientific American — 60-Second Science Science. I’m Christopher Intagliata.

 

 

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