The surface mark of an established plume is a hot spot—an isolated region of volcanoes and uplifted terrain located far from the edge of a surface plate.

一个已形成的烟羽的表面标志是一个热点——一个远离表面板块边缘的火山和隆起地形的孤立区域。

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The standard Create unit has special sensors for other events, such as when the unit bumps into a wall or object and when the unit is at the edge of a surface like a table.

标准的Create单元还有一些用于其他事件的特殊传感器，例如：当工作单元撞到墙壁的时侯，或者当工作单元位于桌子边缘的时侯。

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If future testing goes well and "if my wife allows, " Mr. Branson joked, he and his two children plan to be among the first six voyagers to ride the maiden flight of SpaceShipTwo to the edge of space, or about 60 miles above the Earth's surface, at a maximum speed of about 2, 500 miles per hour.

WSJ: Virgin Galactic Spacecraft Tests Its Rockets in Flight