A library usually has a large selection of books and other resources, which library members can use and borrow for free.

图书馆通常有大量可供选择的书籍和其他资源，图书馆人员可以免费使用和借阅它们。

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Interactive television advertising, which allows viewers to use their remote controls to click on advertisements, has been pushed for years.

交互式电视广告允许观众用他们的遥控器来点播广告，多年来一直被推广。

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Interactive television advertising, which allows viewers to use their remote controls to click on advertisements, has been touted for years.

互动电视广告是一种允许观众用他们的遥控器来点击的广告，多年来一直备受推崇。

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The iPhone 5 is the first of Apple's handsets to support 4G, but it has been optimised for just three spectrum bands - the 1800MHz band, which EE has been allowed to use for 4G services, the 850MHz, which doesn't work in the UK, and the 2.1GHz band, which currently only supports 3G services.

BBC: 4G talks ongoing to speed up auction process

The Vscan is not science fiction but a hand-held ultrasound machine with a scanning wand attached, which has been approved for use in Europe and North America.

BBC: How the hand-held ultrasound scanner works

Northern Ireland is the last place in the UK to switch off the analogue signal which has been in use for more than 70 years.

BBC: Digital Switchover