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。悉尼文波雅思PTE培训学校专门为澳洲，尤其是悉尼、墨尔本的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。
This is Scientific American — 60-Second Science. I’m Christopher Intagliata.
Every flu season—that’s now through the spring—epidemiologists track flu infections as they break out across the country. And they forecast how bad it’s going to get: at the national level, regionally, state by state. They even forecast for metro areas, like New York City, and L.A. Which sounds pretty fine-grained, until you consider that New York City is made up of five boroughs. And that there are actually more than 80 cities… in L.A. County.
So there might be an advantage to forecasting at even smaller scales. “Public health decision-making and interventions are done at small scales, they’re done at the municipal and county scale.” Jeffrey Shaman, an infectious disease modeler at Columbia University.
He and his team built a model to forecast flu within New York City neighborhoods and boroughs, using data on flu cases from 2008 through 2013. They added in something they called “network connectivity”—commuter data, basically. The commuter data didn’t improve the accuracy of hyper-local, neighborhood-level forecasts. But it did improve predictions at the borough level, compared to models without that sort of commuter flow built in. The results are in the journal PLoS Computational Biology.
Shaman says fine-tuned forecasts could warn local hospitals before a big outbreak. “Knowing when that’s going to be will allow them to plan the resources out. Have the staff available. They also need the very basic things, they need gloves, beds, they need ventilators, they need to have those appropriately available in time so they can meet that patient surge.” And—so they can stop the virus’ spread in that most local of networks: within the hospital itself.
Thanks for listening for Scientific American — 60-Second Science Science. I’m Christopher Intagliata.
