Sabre knows that its challenge is to turn away advertising that isn't relevant to a particular consumer at a specific time or location because spamming travelers would lead to a backlash.
Sabre很清楚，其面对的挑战是如何删除掉与消费者所处的具体时间和地点无关的广告，因为对旅行者发送垃圾广告只会产生负面作用。
For its part, Sprint has launched a similar service that can also let parents know when a child arrives at a particular location, such as school or a friend's house.
Sprint在这方面是怎么做的呢，它推出了类似的服务，能让父母知道孩子什么时候到达某个地点，比如学校或朋友家。
Specifically, America's navy wants to be able to forecast whether a vessel in a particular location might cause a bioluminescent glow that would give away its position, says Dr Widder.
威德解释道，具体来说，美国海军是希望能够观测某一特定位置的船只发出的荧光，进而了解这个船只是敌是友。
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