By Greg Morsbach, BBC World Service

媒体英语会带大家一起学习BBC撰稿人在报道世界大事时常用到的单词和短语。

Background: 互联网创始人伦纳德·克兰罗克教授在互联网四十周年庆祝演讲中说，他当初从未料想过这一网络系统会出现黑暗的一面。他说，初期的互联网是在一种相互信任的文化中运作的。

Forty years ago, a team of engineers sent a message from a computer in Los Angeles to a terminal in Palo Alto.

It was supposed to read "login". But only the first two letters arrived.

Nevertheless, it was the first time computers talked to each other.

Now, the man who led that experiment, Professor Leonard Kleinrock, says the internet has since developed a dark or negative side such as viruses and identity theft.

He says he and his team should have installed better protection for web users all those years ago.

Now, the internet is expected to take a huge leap forward.

The internet regulator that controls the world's web addresses is likely to approvedomain names that go beyond the existing Latin-based ones.

• background [´bækgraund]   n.背景；经历；幕后   (初中英语单词)
• computer [kəm´pju:tə]   n.计算机；电子计算器   (初中英语单词)
• supposed [sə´pəuzd]   a.想象的；假定的   (初中英语单词)
• nevertheless [,nevəðə´les]   conj.&ad.然而；不过   (初中英语单词)
• protection [prə´tekʃən]   n.警戒；护照；通行证   (初中英语单词)
• approve [ə´pru:v]   v.赞成；同意；批准   (初中英语单词)
• negative [´negətiv]   a.否定的 n.否定词   (高中英语单词)
• terminal [´tə:minəl]   n.终点(站) a.末端的   (英语四级单词)
• domain [də´mein,dəu-]   n.领土；版图；范围   (英语四级单词)
• identity [ai´dentiti]   n.身份；同一性；一致   (英语六级单词)