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。墨尔本文波雅思PTE培训学校专门为墨尔本，悉尼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。

The global population is now nearly seven and a half billion.
And that’s just humans.
Because our planet is also home to one–and–a–half–billion cows, another billion sheep, and abillion goats.
Their combined belches account for a full fifth of the world’s methane emissions—and methaneis about 30 times more potent at trapping heat than CO2.
But those methane emissions might get cut—by feeding the grazers something called 3-nitrooxypropanol.
“I can tell you, they like it.
No rejection at all.”
Maik Kindermann, an organic chemist at DSM Nutritional Products in Switzerland.
Liking it, in the cow world, he says basically means they’ll still gobble up their food, even withthis stuff mixed in.
Kindermann’s company developed the additive a few years back.
And it only targets those methane–belching microbes, while leaving the rest of the microbiomeuntouched.
The result?
A 30 percent decrease in methane emissions.
The study is in the Proceedings of the National Academy of Sciences.
Kindermann says he thinks the compound could be a win–win for the planet—and the animals.
“You know the methane is kind of a waste product.
And this energy, instead of losing it for the animal, it can be reused for the animal in terms ofperformance, and at the same time we are doing something for greenhouse gas emissionand climate change.”
The product’s not on the market yet—toxicology tests are ongoing.
But the hope is that it might take some of the heat off of beef.