An air pressure altitude measurement system which took advantage of the relationship between air pressure and altitude above sea-level was studied and realized by MCU.

本文研究了一种利用大气压力与海平面高度的关系，使用单片机实现气压高度测量的系统。

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Because the satellite's altitude above sea level is known, the thickness of the ice above sea level can then be determined, allowing the overall thickness of the ice to be calculated.

因为该卫星的海拔高度已知，于是就能够确定海平面以上的冰层厚度，从而可以计算出冰层的总厚度。

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Midui glacier, located in Yupu Township, is the lowest altitude above sea level in the world. It was ranked by China National Geography Magazine as one of the top six most beautiful glaciers in China.

米堆冰川位于玉普乡，是地球上海平面以上的最低点，被中国国家地理杂志评选为中国六条最美冰川之一。

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The air pressure is also now closer to what is normal in Denver, Colorado -- the mile-high city at 5, 280ft -- than the traditionally higher, and more mountaintop-like standard of 8, 000ft above sea level, sparing fliers from the mild altitude sickness that can be experienced when flying a long distance.

BBC: Increased comfort in the sky