Continued bombardments and internal pressures made the growing Earth hotter, causing its interior to melt and the heavier elements to sink and form Earth's core.

持续的轰击和内部压力使成长中的地球越来越热，导致其内部融化，较重的元素下沉形成地核。

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The Earth is protected from much of this radiation because it has an internal magnetic field that generates a protective magnetosphere.

地球因为有一个由内部磁场产生的保护磁层而免受大部分辐射的影响。

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A tulou building usually consists of packed earth on the outer wall and a wooden internal framework.

土楼通常由生土夯筑而成，内部为木制结构。

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This information should give scientists fresh insight into the internal structure of Earth's satellite.

BBC: Nasa reveals new information about moon probes crash sites

Similarly, one camp maintains that temperatures are rising dramatically with unspeakable portents, while the other thinks what has happened is entirely a result of undefined internal oscillations in the earth-sun climate system, and that there is virtually no human component to climate change.

FORBES: Global Warming: Hotheads, Flatliners and Lukewarmers, Part One

To work out exactly where it is, the internal navigator will also be able to detect signals from the Global Positioning Satellites that circle the earth.

ECONOMIST: A personal eye in the sky