Figure 10 illustrates how the location structure changes as we traverse the tree, here going down (always to the first left child), then right, then down.

图10展示了在我们遍历树时位置结构发生了怎样的变化，在这里向下(始终下移至左侧第一个子节点)，随后向右，然后再向下。

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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。

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To complete the evaluation of the entire path location expression, each of these elements will be stepped into and the first occurrence of an expected child element named - USPrice matched on.

要完成整个路径位置表达式的求值，所有元素都必须步进，并匹配第一次出现的子元素named - USPrice。

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VIVOplay allows children to easily reach their parents when they need to and lets parents call their children and track their child's location in the event of an emergency with a simple, custom-designed smartphone app.

ENGADGET: VivoPlay packs WiFi, GPS and a GSM connection for tracking, calling your kids (video)

In Joplin, the schools are open again, though just about every child is in a different location than he or she was before the tornado.

FORBES: High School Football Helps Tornado-Ravaged Joplin Cope With Its New Normal

Each fostered child should be able to live with a foster carer carefully chosen to match their specific needs in terms of location, lifestyle, language and culture.

BBC: Country needs 450 more fosterers