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，练习记笔记技巧和复述。
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 Steve Mirsky.
May 18th is the 37th anniversary of the massive explosion of Mount Saint Helens. But within days of the volcano erupting, the local ecosystem started to bounce back. Thanks to some unassuming little animals that spend lots of time underground.
“The pocket gophers were the ecological heroes of Mount Saint Helens.”
Emory University paleontologist and geologist Anthony J. Martin.
“You normally don’t hear those words put together, pocket gopher and hero.
But they were…these small burrowing mammals were able to survive this massive, devastating volcanic eruption.”
Just as numerous animals that live underground have survived catastrophes
and predators for hundreds of millions of years. As Martin discusses in his new book
The Evolution Underground: Burrows, Bunkers, and
the Marvelous Subterranean World Beneath Our Feet.
“The reports I was reading about this, about how these researchers
in helicopters are flying over the devastated landscape—just a few days later there were the burrow mounds. Pop pop pop. Thinking about these gophers that were below the ground.
And they survived that….”
“So that to me was a golden opportunity to talk about that,
as this incredible story of survival, but also renewal. That these little burrowing mammals
brought back that landscape. Because their burrows served first of all
as refuge for any other small animals
that were there. So other small mammals and other vertebrates,
such as amphibians and
reptiles that lived there, they were either in their own burrows or
they were in pocket gopher
burrows or other small mammal burrows in the area.”
“The burrowing also brought up seeds. The seeds are already buried,
so that caused plants to
start sprouting in the area, where it wasn’t so much wind-blown seeds…then of course once
other animals started coming back into the area, like elk, and they
started dropping seeds
through their feces and otherwise affecting the surface ecology,
that then worked together to
bring those ecosystems back to life. But the gophers were key in this.
They really were
essential for these ecosystems to be able to bounce back.”
You can hear an extended interview with Martin about his book
in a Science Talk podcast
posted on our website. And there’s a children’s book just about
the gophers and Mount Saint
Helens called Gopher to the Rescue by Terry Jennings. Finally,
for general information about gophers and their effect on landscapes, check out the nature documentary
For Scientific American — 60-Second Science Science. I’m Steve Mirsky.