China has 123,000 km of navigable waterways, of which 61,000 km are officially classified for commercial navigation purposes.

中国约有12.3万公里可通航的河道，其中6.1万公里为商业运输航道。

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Commercial satellites provide businesses with everything from data and video transmissions to support for automated bank teller systems and consumer navigation devices.

商业卫星为企业用户提供从数据和视频传输到银行自动柜员机系统和消费者导航设备支持等各种服务。

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Commercial USES for mathematical workstations are vast: from basic engineering to designer drugs and from gene therapy to celestial navigation, mathematics rules the world.

数学工作站的商业使用群体非常庞大：从基础工程到设计创意，从基因治疗到天体导航，数学统治着整个世界。

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That has already happened with weather data and with America's GPS satellite-navigation system that was opened for full commercial use a decade ago.

ECONOMIST: Governments are letting in the light

The GPS system was originally developed by the US military to target missiles and guide troop movements but now has dozens of commercial applications from helping motorists find their way about to ships' navigation, search and rescue and road pricing.

BBC: NEWS | UK | UK Politics | Galileo: Star project or black hole?

This hardware was used to build a simulated aircraft that ran many of the systems found on commercial aircraft and could swap data via radio with the air traffic and navigation systems used in the real world.

BBC: Hacker targets flight deck computer systems