对于要与外部联网的电算化系统，应采用防火墙技术。

English is currently one of the most widely spoken and written languages worldwide, with some 380 million native speakers, who live in the UK, the USA, Australia, New Zealand, South Africa and other countries. It is spoken as an official language or second language in countries such as India and Nigeria. In these countries, English is the language of the government, newspapers, radios and TV stations. Besides, it is one of the working languages of the UN as well.
And there are some other facts about English you might be interested in knowing.
Over 700 million people, speak English, as a foreign language.
Did you know that of all the world's languages (over 2,700), English is the richest in vocabulary; and that the Oxford English Dictionary lists about 500,000 words,
Five of the largest broadcasting companies in the world (CBS, NBC, ABC, BBC and CBC) broadcast in English, reaching millions and millions of people all over the world.
It is said that over 90 percent of Internet web pages and over 80 per cent of the world’s emails are in English.
As a foreign language, it is learnt in almost all non- English speaking countries. In China, for example, it is not just students who learn English, but also many adults.
Although there are some differences between the English spoken in different countries, people from these countries usually have no problems communicating with each other.

English is one of the most widely    小题1:    languages.
Facts	Detailed information
English-speaking countries	The UK, the USA, Australia, New Zealand, South Africa…
Official or working language	India, Nigeria and     小题2:
Widespread use	On the radio, on the web page, and in     小题3:
小题4:	With 500,000 words in Oxford English Dictionary
Conclusion	Despite the    小题5:    that exist, people have no difficulty in communicating.