2. all those people descended from a common ancestor， 所有来自同一祖先的人们。descended from a common ancestor”是一个省略了that的定语从句，修饰people.descended from的意思是传下...
9. Therefore we can say that the nuclear family becomes more important than the extended family as the society industrializes.句子中的therefore是一个副词，通常用来表...
Text A Telecommunication via Satellite本课主要单词1. telecommunication n. 电信，远距离通信请注意这个词的构成，tele-是一个前缀，意思是远”，远距离”。用tele-为前缀构成的词很多，如：television（电...
14.educational adj. 教育的education n. 教育educate v. 教育There are many educational programs on TV. （电视播放很多教育节目。）He received a good education when he was yo...
本课简介技术是否也是一把双刃剑，在给人们带来帮助的同时也带来了弊端？本课通过卫星通讯的利弊昭示人们明智”地运用技术才能使我们走向成功。卫星、计算机和电视的三结合改变了人们的生活。卫星被用来传送电视节目、电话和印刷材料；卫星被用于远程教育，使边远地区的人们通过空中教室”接受教育...
7.The most common use of telecommunication satellites，however，has been for transmitting telephone calls.however在本句中做副词用，意思相当于but.但是however和but在用法上是有差异...
Text A learned words and popular words本课主要单词1. learned adj. 有学问的，博学的；学术上的这个单词做形容词用时有两种读音，意思是有学问的，博学的；学术上的”；意思是经过训练学到的”。a learned man （学者）a...
10.case n. 情况，事实；病例，案例；箱子，盒子1）He thought the more time he spent on his lessons， the better performance he would make. But now he realizes it is not th...
本课主要语言点1. In every cultivated language there are two great classes of words which， taken together， make up the whole vocabulary.class在本句中的意思是种类”...
9. Still the classification into learned” and popular” is convenient and sound .本句中的sound是形容词，意思是正确的；明智的”，如：1）He felt so happy that ...