Wearing their thick space suits, they learned to deal with an environment where there is neither weight nor gravity, neither "up" nor "down".

他们穿着沉重的太空服，学习如何对付一个没有重量、没有引力，也没有“上”与“下”的环境。

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Space probes show a body covered with a thick layer of ice.

太空探测器显示了一个覆盖着一层厚厚的冰的物体。

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It is an increased area of low thick clouds, the type that reflects a rare portion of solar energy back to space and cools the Earth.

它是一片变大的低厚云层，这种云层将少量的太阳能反射回太空，为地球降温。

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The two times humans have reached the deepest part of the ocean, it required a foot-thick flawless metal sphere with barely enough internal space to sit down.

FORBES: Why Don't We Spend More On Exploring The Oceans, Rather Than On Space Exploration?

In August 2011, Speth and his chief engineer finally broke through more than two meters of earth and reinforced concrete and the shelter's 278-millimeter-thick ceiling to emerge into a 40-square-meter space, divided into five interconnecting rooms by heavy metals doors.

CNN: Vietnam War bunker reopened under luxury hotel

The conversion took five years, and involved removing the roof, more than 10 feet thick, with a diamond saw, as well as extracting interior walls to make space for the art.

WSJ: New Lives for Nazi-Era Bunkers