So far, English is also the preferred language of air traffic control in many countries and is used widely in sea travel communication.
到目前为止，英语还是许多国家空中交通管制的首选语言，并广泛应用于海运通信。
Another factor has something to do with information exchange around the world.
另一个因素与世界各地的信息交流有关。
As we all know, a great deal of academic discourse around the world takes place in English.
我们都知道，很多学术话语都是英语。
It is often a lingua franca of conferences, for example,
例如，英语通常是会议的通用语，
and many journal articles in fields as diverse as astronomy, trial psychology and geology have English as a kind of default language.
而且天文学、实验心理学和地质学等领域的许多期刊文章都把英语作为默认语言。
The last factor I cite here concerns popular culture.
我在这里谈到的最后一个因素与流行文化有关。
In the western world, at least English is a dominating language in popular culture.
在西方世界，英语至少是流行文化中的主导语言。
Pop music in English can be heard on many radios, thus many people who are not English speakers can sing words from their favorite English medium songs.
收音机里可以听到英语流行音乐，因此许多不说英语的人也可以唱几句他们最喜欢的英语歌曲。
And many people who are regular cinema-goers or TV viewers can frequently hear English in subtitled films coming out of the USA.
许多经常看电影和电视的人经常能在美国的字幕电影中听到英语。
Now, to sum up, in today's lecture, we have reviewed some of the reasons or factors that lie behind the popular use of English as the No. 1 world language.
现在，总结一下今天的课程，我们探究了英语作为第一世界语言得到广泛应用的一些原因或因素。
Before we finish, I would like to leave a few questions for you to think about. Is the status of English as the No. 1 world language assured in the future?
在结束之前，我想留下几个问题供大家思考。在未来英语一定会是世界第一语言吗？
Will it split into varieties that become less mutually intelligible? Or will some other language or languages take the place of English as world language in future?
它会分化成更互不相通的变种吗？或者其他某种语言或几种语言会取代英语成为未来的世界语言吗？
These questions are not easy to answer, I know. But they are definitely worth pondering over after the lecture.
我知道这些问题不容易回答。但这些问题绝对值得在讲座结束后认真思考。
Ok, this brings to the end of today's lecture. Thank you for your attention.
好了，今天的课到此结束。谢谢大家。