PTE听力口语练习-科学60秒- HIV Transmission

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:

Syringe Design Change Could Cut HIV Transmission


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。

Sharing syringes is a big no-no. But despite the warnings, needle sharing among injection drug users is still a significant cause for the spread of HIV and other infectious diseases.

But HIV transmission due to needle sharing could be nearly eradicated by merely changing the design of the syringe. So says a study in theInternational Journal of Drug Policy. [William A. Zule et al., Are major reductions in new HIV infections possible with people who inject drugs? The case for low dead-space syringes in highly affected countries]

When the plunger on a syringe is fully depressed, a small amount of fluid stays trapped in what is known as the “dead space.” By reducing the amount of dead space in the syringe design, researchers say they can reduce the amount of infectious blood trapped inside by a factor of a thousand—and thus vastly reduce the numbers of viral particles available to spread disease.

Using a simulation model, the authors found that switching to low-dead-space syringes could reduce annual HIV infections from syringe sharing to nearly zero within eight years.

Although there are still a number of barriers to making low-dead-space syringes available worldwide, the authors say this low-cost intervention could help keep drug users—and their families—disease free.

—Gretchen Cuda Kroen


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