通过每隔两天发短信给参与的志愿者询问他们开心与否，同时还运用了先进的“卫星导航系统”来确定参与者的位置，从而调查出全国位于哪的部分的人们过得最开心。
Using satellite navigation systems, their exact locations were also logged - allowing the scientists to pinpoint the happiest parts of the country.
作为一家高科技公司，我们不断拓展我们的产品系列，今后将陆续推出车载数字电视、GPS 车载导航系统等先进的产品。
As a high-tech companies, we continue to expand our product line, will launch vehicle digital TV, GPS car navigation systems and other advanced products.
SELEX Galileo公司今天推出Galileo星座，该星座是世界上最先进的卫星导航系统，卫星上将装备SELEX Galileo公司的PHM原子钟。
The European Space Agency's Galileo constellation - the world's most sophisticated satellite navigation system which was launched today - will have SELEX Galileo's PHM atomic clocks on board.
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