单词整理：
1，tout
听力原文：Advocates for self-driving cars love to tout the benifits the cars would bring.
牛津解释：
a.[transitive]toutsomebody/something (as something)to try to persuade people that somebody/something is important or valuable by praising them/it
eg. She's being touted as the next leader of the party.
Their much-touted expansion plans have come to nothing.
b.[intransitive,transitive](especially British English)to try to persuade people to buy your goods or services, especially by going to them and asking them directly tout(for something)
eg. the problem of unlicensed taxi drivers touting for business at airports
He's busy touting his client's latest book around London publishers.
c.[intransitive,transitive])tout(something)to sell tickets for a popular event illegally, at a price that is higher than the official price, especially outside a theatre,stadium, etc.
2,congestion
听力原文：Benifits of self-driving cars such as fewer accidents and less congestion.
牛津解释：
a,the state of being crowded and full of traffic
---traffic congestion and pollution
b,the state of part of the body being blocked with blood ormucus
3,alleged
听力原文：Another alleged value of being a passenger rather than a driver is more productivity.
牛津解释：
a.stated as a fact but without any proof
thealleged attacker/victim/killer(=that somebody says is one)
thealleged attack/offence/incident(=that somebody says has happened)
The girl gave evidence in court against her alleged attacker.
4,whittling
听力原文：But most people might not spend their new-found free time in self-driving cars whittling down their to-do lists.
牛津解释：
whittle something ....down
to reduce the size or number of something
eg. I finally managed to whittle down the names on the list to only five.
5,whittle
牛津解释：
to form a piece of wood, etc. into a particular shape by cutting small pieces from it
whittleA (from B)He whittled a simple toy from the piece of wood.
whittleB (into A)He whittled the piece of wood into a simple toy.
6,motion sickness
听力原文：And then there are people who get motion sickness.
牛津解释：
the unpleasant feeling that you are going tovomit(呕吐), that some people have when they are moving, especially in a vehicle
7，apprehension
听力原文：of course the level of apprehension people experience in self-driving cars or about getting into them may change in the long-run.
牛津解释：
a.[uncountable,countable]worry or fear that something unpleasant may happen {synonym anxiety}
eg.There is growing apprehension that fighting will begin again.
He watched the election results with some apprehension.
There is apprehension about the safety of the missing children.
They shivered with apprehension.
b.[uncountable](formal)the act of capturing or arresting somebody, usually by the police
eg. the apprehension of the terrorists in the early hours of this morning
8, auto
听力原文：there's still a lot to be figured out before autmatic autos rule the roadways.
牛津解释：汽车
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