Retell Lecture一直都是PTE考试中最重要的一项。就像大家所熟知的那样， PTE采取交叉打分机制，因此Retell Lecture不仅影响大家的口语分数，同时也在很大程度上决定着听力分数的高低。然而，因为Retell Lecture机经命中率比较高，但是有原文的机经却不是很多，因此大家往往忽略了RL练习的重要性，草草地看一遍机经就去考试了。在考试过程中，很多同学都纯靠回忆，很容易在高度紧张的时候一味地试图回忆机经中的内容而没能认真听录音的内容，这样做会使大家的流利度分受到极大的影响。而且一旦题目稍有变化将会不知所措，大大影响口语和听力的分数。所以在日常备考阶段，对每篇有原文的Retell Lecture的真题进行透彻的学习和分析，才是正确的复习方法。

以下是高频考题SmartphoneApps 的音频以及分析，并附上高分参考答案。 

音频链接：

https://www.voanews.com/a/smartphone-apps-help-you-monitor-your-health/4388692.html

Computer scientist Shwetak Patel and his team are developing new sensing systems. The initial focus was really around energy and water monitoring. They built a new generation of smart sensors that monitor electronic interference on a home’s power line or water pressure changes in the plumbing. Most of this technology has already found industrial applications,and Patel and his team turned their attention to adapting the technology for personal health monitoring. ‘So how do we take this noise and make it into asignal interest was hard to us, hard to us in the core of what we did for many years and we’re taking that work and applying it to other domains.’ They’re looking to take advantage of all the functionality built in our smartphones. With the users’ permission, this app can use the microphone built into most smartphones to listen to background noises, such ascoughing searching for patterns that suggest a trip to the doctor might be anorder. ‘We’ve constructed these models that try and understand how sound works,how it, what its patterns are and we give it a whole bunch of examples of different kinds of audio, things like people talking, things like people laughing, sneezing and of course coughing.’This app uses a phone’s camera to check hemoglobin levels in blood by analyzing thecolor of capillary fluid through the skin. ‘Generally, what happens is if you’re anemic, your bloods may be a little less red and we take advantage of that by putting your finger over a camera of a phone, the camera of the phone can actually see the coloration of the blood,’and this test uses the camera to tell parents worried about jaundice in new born infants. ‘Now, jaundice is something that doctors who have seen tons of babies.He just can figure out on a very basic level of it, is this baby, do they needto get treatment or are they in a good condition, while the first-time paren thas no idea necessarily what jaundice might look like.’The researchers say the built-in sensors foundin smart phones are already common place, but their applications and their implications for our health and well being may be more far-reaching than weever imagined.

我们可以大致将这段语音分为以下几个部分，我们可将这几部分分别用一句话概括。

Computer scientist Shwetak Patel and his team are developing newsensing systems. The initial focus was really around energy and watermonitoring. They built a new generation of smart sensors that monitor electronic interference on a home’s power line or water pressure changes in the plumbing. Most of this technology has already found industrial applications,and Patel and his team turned their attention to adapting the technology for personal health monitoring. ‘So how do we take this noise and make it into asignal interest was hard to us, hard to us in the core of what we did for many years and we’re taking that work and applying it to other domains.’ They’relooking to take advantage of all the functionality built in our smartphones.

这段话首先介绍了new sensing systems起初用在工业方面，例如监控电路及水压，现在科学家试图将这项技术用在监控个人健康。因此，他们希望将这些功能装在手机上。

因此这段话可概括为：

New sensing systems areusually used in industrial applications, but now scientists want to adapt itfor personal health monitoring and built it in smartphones.

With the users’ permission, this app can use the microphone built intomost smartphones to listen to background noises, such as coughing searching for patterns that suggest a trip to the doctor might be an order. ‘We’veconstructed these models that try and understand how sound works, how it, whatits patterns are and we give it a whole bunch of examples of different kinds of audio, things like people talking, things like people laughing, sneezing and of course coughing.’

这段话主要讲的是在用户许可的情况下，这款应用通过使用装在手机里的麦克风来获取背景音。通过建立这些模型，理解这些声音，这些声音包括人们说话，笑，咳嗽以及打喷嚏的声音。

因此，这段话可以概括为：

With the users’ permission,scientists construct and understand the background noises which are built intomost smartphone, including laughing, sneezing and coughing.

This app uses a phone’s camera to check hemoglobin (血红蛋白) levelsin blood by analyzing the color of capillary (毛细管) fluidthrough the skin. ‘Generally, what happens is if you’re anemic (贫血的), your bloods maybe a little less red and we take advantage of that by putting your finger over a camera of a phone, the camera of the phone can actually see the coloration of the blood,’ 

这段话描述的是：这款应用通过将手指放在手机的相机上，这样就可以看到血液的颜色，用此来分析人们是否贫血。

因此，这段话可以概括为：

By putting finger over acamera of a phone, the app can see the coloration of the blood and determine whether you are anemic. 

and this test uses the camera to tell parents worried about jaundice in new born infants. ‘Now, jaundice is something that doctors who have seen tons of babies. He just can figure out on a very basic level of it, is this baby, do they need to get treatment or are they in a good condition, while the first-time parent has no idea necessarily what jaundice might look like.’

这段话向我们介绍了手机相机的另一个用途。新生儿父母可以用过手机相机来判断婴儿是否患有黄疸。

因此，这段话可以概括为：

Through the camera, the first-time parents can figure out whether their babies have jaundice or not.

The researchers say the built-in sensors found in smart phones arealready common place, but their applications and their implications for our health and well being may be more far-reaching than we ever imagined.

这段话是对整段话的总结。即使手机上的built-in sensors已经十分普遍的，但是在健康方面的应用还有很多需要探寻的。

因此，这段话可以概括为：

Although the built-insensors are common place, the applications in health and well being may be morefar-reaching.

·     New sensing systems are usually used in industrial applications, but nowscientists want to adapt it for personal health monitoring and built it in smartphones.

·   With the users’ permission, scientists construct and understand the background noises which are built into most smartphone, including laughing,sneezing and coughing.

·           By putting finger over a camera of a phone, the app can see the coloration of the blood and determine whether you are anemic.

·    Through the camera, the first-time parents can figure out whether their babies have jaundice or not.

·        Although the built-in sensors are common place, the applications inhealth and well being may be more far-reaching.

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