The second part of a spatial reference system is its projection, which defines how to lay out the Earth surface onto a 2-d surface.

空间引用系统的第二部分是投影，它定义了如何将地球表面放置在2 - d平面上。

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The subterranean ocean likely lies nearly 100 miles below the surface of Jupiter's moon, the largest natural satellite in the solar system, giving hope that life beyond Earth is possible.

木卫三是木星在太阳系中最大的卫星，它的地下海洋可能在表面以下近100英里处，这给了我们可能有地外生命的希望。

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The Earth Surface System is a complicated system which includes geosphere , atmosphere, hydrosphere and biosphere.

地球表层系统是由岩石圈、大气圈、水圈和生物圈相互耦合和变化组成的复杂巨系统。

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Instead of jamming electrons through wire, generators convert them to microwave signals and fling these along the surface of the earth, between a system of relays spaced about 20 or 30 miles apart.

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But chip makers are having trouble making more precise beams, and the Global Positioning System, which allows people to locate themselves to within a few metres on the surface of the earth, is limited by the performance of its atomic clocks.

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