1、Unit 4 A glimpse of the futureIs artificial intelligence（AI） the biggest threat to humanity？Millenniumbutterfly has got his own super-smart personal assistant built into his phone. Most of the time when he isdesperate for solutions to some problems the PA is bound to give him proper recommendations.
2、 And speaking of hanging out， he thinks self-driving cars are a lot safer， since they wont be susceptible to human error. In the eyes of Popkid， the truth is that none of us is prepared to go through the challenges presented by AI. If AI thinks were not valuable， it might wipe us all out！ Though sel
3、f-driving cars bring convenience， we should think about the demand of the taxi drivers who may lose their jobs. Pink_haze believes most of the value of AI lies in its capacity to analyse and interpret vast amounts of data， but super-intelligent AI could also be the most dangerous if it goes wrong or
4、 falls into the wrong hands. However， no one can stop the trend. We have no choice but to embrace AI and regulate it.1capacityn.能力；容量1.译林选必4Facial recognition technology， with its capacity to analyse（analyse） a huge amount of data， has come into widespread use.点拨capacity能力是抽象名词，其后常用不定式作后置定语。有类似用法的抽象
5、名词还有：ability，desire，ambition，attempt，chance，determination，eagerness等。2.我能说一口流利的英语，与外国游客交流没有困难。（自荐信） With the capacity to speak/for speaking fluent English， I have no difficulty communicating with foreign visitors.（with复合结构） Capable of speaking fluent English， I have no difficulty communicating with
6、foreign visitors.（形容词短语作状语）have a capacity to do sth./for （doing）sth.有做某事的能力（be able to do sth.have the ability to do sth.）capable adj.有能力的be capable of有的能力2demandn.需要，需求；要求vt.强烈要求；需要1.译林选必2The routine tasks that occupy most of the day are demanding（demand）， but they can also be extremely rewarding.
7、2.The government is unlikely to agree to the rebels demands for independence.3.My father came downstairs and demanded to know（know） what was going on.点拨demand不能用于demand sb. to do sth. 结构；向某人要某物不能用demand sb. sth.结构，要用demand sth. of/from sb.结构。4.As new members are in great demand in our basketball clu
8、b， Im writing to invite you to join it.（邀请信）5.因为摘苹果需要爬树，农民们要求我们小心谨慎一些。（活动报道）Because picking apples involved climbing trees， the farmers demanded that we （should） be careful and cautious.6.据说像这样的中文培训课程将会满足你的需求。It is said that such a Chinese training course will meet/satisfy your demand.be in （great）
9、demand 需求量（很）大meet/satisfy ones demand（s）（for sth.）满足某人（对某物）的需求/要求强烈要求做某事：demand to do sth.demand that . （should） do sth.（从句用虚拟语气）demanding adj. 要求高的；难满足的3desperateadj. 拼命的；绝望的，孤注一掷的；非常需要1.北师选必1My friends try to drag me away from my phone， but as soon as Im alone again， Im desperate to get（get） back
10、 to the online world and the intense activity that it provides.2.Having walked for half an hour in such hot weather， I was desperate for a cold drink.3.Faced with this serious problem， David took a deep breath， desperately（desperate） trying to keep calm.（读后续写之情绪描写）4.我们从小就被教育要向那些迫切需要帮助的人伸出援助之手。Weve b
11、een educated to offer a helping hand to those who are in desperate need of help/who are desperately in need of help since we are very young.（need n.）5.我渴望尽快找到解决这个问题的办法。 I am desperate to find a solution to the problem as quickly as possible.点拨表示渴望某物/做某事的短语还有：be eager for sth./be eager to do sth.， be
12、 anxious for sth./be anxious to do sth.， long for sth./long to do sth.， be dying for sth./be dying to do sth.等。be desperate for sth.迫切需要某物be desperate to do sth.渴望做某事desperately adv.绝望地；拼命地；非常in desperation 绝望4hangout闲荡，常去某处1.Better not hang out/around with Sam then. He is working on his article on
13、critical thinking.2.It is often the case that anything is possible for those who hang on to hope.3.Im sorry I have to hang up now. Someone is knocking at the door.4.I think theyre lying because parts of their story just dont hang together.5.偶尔和朋友出去玩可以帮助释放学习或工作中的压力。（v-ing作主语）（建议信） Occasionally hangin
14、g out with friends can help release the pressure from study or work. 点拨补充知识：hang有两组动词变化，hang表示悬挂；垂下时，它的动词变化为hanghunghung；但是，表示（被）绞死，施以绞刑时，它的动词变化为hanghangedhanged。hang up挂断电话；终止使用hang on 稍等一会；抓紧；（在逆境中）坚持，不放弃hang on to sth. 抓紧某物；保留；不卖掉；不放弃hang around闲荡，逗留hang together同心协力；形成一致、连贯的整体5gothrough仔细察看，检查，审
15、查；经历，遭受（苦难等）；阅读，审阅结合语境写出下列句子中画线部分的含义1.Go through those things that seem impossible， and achieve what we never believed we could.经历2.You had better go through your homework again to make sure that nothing important has been left out. 检查3.Going through the newspaper in the morning is my grandpas habit
16、. 阅读4.The biologist went through a lot of difficulties while she stayed in Africa studying wild animals for 20 years. 遭受（苦难等）6though引导的让步状语从句1.虽然那天我很累，但他们的笑容让我感觉所有努力都是值得的。（读后续写之心理描写） Though I was very tired that day/Very tired though I was that day， their smiles made me feel all the efforts were rew
17、arding.2.Though the activity is challenging， I am convinced that all the participants will benefit a lot from it. Challenging though the activity is， I am convinced that all the participants will benefit a lot from it.（倒装结构）though 引导的状语从句也可用倒装语序，其结构为表语形容词/副词/动词/名词/分词though主语be/实义动词/情态动词/助动词。若提前的表语是可数名词单数，要省略冠词。
