12. 第十二篇 How Technology Helps People（上）讲解音频

第十二篇 Caring for the Five Senses（上）

Nowadays, we live in an advanced world. We use many new inventions that people long ago never imagined. In the past, people could not regularly communicate with others. It took days ,weeks, or even months just to send a letter. There were no telephones. So people had to talk face to face.

短语搭配：in an advanced world在一个发达的世界

Advanced economy=developed country发达经济体/发达国家

Emerging economy=developing country发展中国家

Video chat视频通话  face to face面对面  in person亲自

重点词汇：regularly经常  penpal笔友