Google's Latitude service offers a similar opt-in user-tracking service also. But so far, Latitude lacks the mainstream appeal of Apple products, and remains a niche technology.

谷歌的纬度服务也提供了一个和这个类似的服务，但是，该项服务并没有像苹果的服务一样被大众广为接受，它只是个小型的技术而已。

youdao

What you need from a search service is a PHP page that takes a latitude and longitude pair, along with a radius, and returns any articles that have a location with that circle.

对于搜索服务，您需要的是一个php页面，该页面使用纬度和经度对以及半径，并且返回与该圆具有一定位置关系的任何文章。

youdao

Last year Google launched a service called Latitude that allows friends to track one another's movements.

去年，Google投产了一个叫Latitude的服务，可以让朋友们相互追踪彼此的去向。

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Google's Latitude service, launched in February, constantly updates users' location, enabling contacts to see their whereabouts on a map as well as their activity via status updates.

CNN: In an emergency, who do you call?

Reports suggested Apple made the move after Google proved unwilling to upgrade its service unless it was allowed to include more of its own branding and Latitude - a service which shows users where their friends are located.

BBC: Google adds Street View to its maps mobile web app

Last year Google launched a service called Latitude that allows friends to track one another's movements.

ECONOMIST: Location-based services on mobile phones