PTE听力口语练习素材:科学60秒-Oregano Oil

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,练习记笔记技巧和复述。废话少说,下面开始:


60秒科学:Oregano-Oil-Kills-Norovirus-but-Not-Enough

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。

Internet herb stores claim that swallowing oregano oil can cure your cold or flu. But the devil’s in the details. Oregano oil is an antimicrobial, and can even kill off that tough cruise ship plague, norovirus but there’s no evidence it can do so inside your body, scientists say. It works to inactivate pathogens before they get inside.

Researchers experimented on the mouse form of norovirus genetically similar to the hard-to-grow human strain. They treated virus colonies with solutions of either four percent oregano oil, or half a percent carvacrol the active ingredient.

Turns out oregano oil cut virus numbers by 10-fold. Carvacrol: 10,000-fold. In comparison, bleach achieves a million-fold reduction. The results appear in the Journal of Applied Microbiology.

So, oregano oil’s nowhere near as effective as bleach. But it’s nontoxic, and has no noxious fumes. Unless you hate the smell of oregano. So study author Kelly Bright of the University of Arizona says it could be useful in food-safety settings: You could maybe reduce the amount of bleach you’re using by throwing in some carvacrol or essential oil.Just don’t expect it to cure you, once you’ve got the bug.

–Christopher Intagliata

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