PTE听力口语练习-科学60秒-Frosty Moss

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:

Frosty Moss Springs to Life after 1,500-Year Snooze


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。

Sleeping Beauty slept for a hundred years. But that’s just a quick nap compared with Antarctic moss. They’re the dominant vegetation in polar regions. And now a sample has been revived after lying dormant for at least fifteen hundred years.

Researchers extracted a 1.4 meters long cylinder of permafrost containing Antarctic moss. They then cultivated shoots taken from various points along the length of the cylinder. Many of these shoots flourished, even though they’d been long frozen. And carbon-dating of material alongside the core at the 1.1 meter mark showed it to be from 1,500 to 1,700 years old.

The researchers considered that the ancient sample could have been contaminated with more recent plant spores. But then they’d expect to see multiple moss species. That they found just one species strongly suggests it is indeed the ancient moss springing back to life. The work is in the journal Current Biology. [Esme Roads, Royce E. Longton and Peter Convey, Millennial timescale regeneration in a moss from Antarctica]

The longest known revival for a frozen multicellular organism had been only about 20 years. But these frosty mosses could break that record in their sleep.

—Sophie Bushwick


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