PTE听力口语练习-科学60秒-Milky-Ways-Home-Supercluster

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:


60秒科学:Milky-Ways-Home-Supercluster-Found

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。

We finally know our cosmic address. For the first time, astronomers have identified our home supercluster a conglomeration of groups of galaxies and larger clusters of galaxies, all interconnected in a stringy web.

Researchers, led by an astronomer at the University of Hawaii at Manoa, have named this supercluster Laniakea, which means immense heaven in Hawaiian. Laniakea encompasses 100,000 galaxies stretched out over 500 million light-years. Our own Milky Way is just one of these. The study is in the journal Nature.

Superclusters are some of the universe’s largest structures, and have boundaries that are tough to define especially from inside one. The team used radio telescopes to map out the motions of a large collection of local galaxies.

Within a given supercluster, all galaxy motions will be directed inward, toward the center of mass. In the case of Laniakea, this gravitational focal point is called the Great Attractor, and influences the motions of our Local Group of galaxies and all others throughout our supercluster. It’s time to update our intergalactic maps: Laniakea is home sweet home.

发表回复

您的电子邮箱地址不会被公开。 必填项已用*标注