The child receives a message saying that the handet's position has been requested, and the parents receive an address, or a marker on a web-based ap, giving the child's location.

孩子会收到一条“该手机的位置被要求发送”的信息，父母则收到一个地址，或是网络地图上的一个标记，指示出孩子的位置。

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A pattern, also called marker, is a rectangular shape that you need to print and position in front of your camera.

模式(又叫做标记)是一个矩形，你用其在相机前打印和定位。

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The building occupies a pivotal position at northeast corner of Memorial Park, and its profile reflects this role as a symbolic marker.

大楼位于了纪念公园东北角的关键位置，其形象充分反映了这一角色的地标性特征。

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Others believe he is merely placing a marker and trying to position himself for a better shot at the prize when the vacancy arises again and his profile is higher.

BBC: David Davis