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。
The sound of a cracking knee isn’t particularly pleasant.
But it gets worse when you listen up close.
“It does for most people. But for me, it just makes me excited.”
Omer Inan, an electrical engineer at Georgia Tech.
“I actually feel like there’s some real information in them that can be exploited for the purposesof helping people with rehab.”
Inan’s experience with cracking knees goes back to his days as an undergrad at Stanford,where he threw discus.
“If I had a really hard workout, then the next day of course I’d be sore, but I’d also sometimesfeel this catching or popping or creaking every now and then in my knee.”
A few years later, he found himself building tiny microphones at a high–end audio company.
So when he got to Georgia Tech and heard the Defense Advanced Research Projects Agency,DARPA, wanted better tech for knee injuries, he thought:
Why not strap tiny microphones to people’s knees, to eavesdrop as their legs bend? ”
What we think it is, is the cartilage and bone rubbing against each other, the surfaces inside theknee rubbing against each other, during the movements.”
He and a team of physiologists and engineers built a prototype with stretchy athletic tape anda few tiny Mics and skin sensors.
And preliminary tests on athletes suggest the squishy sounds the device picks up are moreerratic, and more irregular, in an injured knee than in a healthy one.
Which Inan says might allow patients and doctors to track healing after surgery.
Details appear in the IEEE Transactions on Biomedical Engineering.
“The primary application we’re targeting at first is to give people a decision aid duringrehabilitation, following an acute knee injury, to help them understand when they canperform particular activities, and when they can move to different intensities of particularactivities.”
A useful thing to take a crack at.