As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologic time periods.

作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。

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Our company also for the new seal to replace the old Chapter shell, s surface, such as maintenance services.

我公司同时还为新老印章用户更换章壳、章面等维护服务。

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SpaceShipOne will fly 100km (62 miles) above the Earth"s surface, just breaking through the planet"s atmosphere.

“太空飞船一号”将会在距离地球表面100千米（62英里）的上空飞行，这个高度刚刚超出地球的大气层。

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The atmosphere is about twenty-percent oxygen and eighty percent nitrogen from Earth's surface to where space begins at one-hundred-twenty kilometers up.

VOA: special.2011.04.06

The magnet creates a field which changes the polarity of a tiny, tiny portion of the metal particles which coat each platter's surface.

这个磁体创建一个,能改变覆盖在,磁盘表面小金属粒子的磁极。

哈佛公开课 - 计算机科学课程节选

because when you're up on that point, you see anything that's in the water, anything close to the surface and,

因为当你站在那里的高处，你能看到贴近水面的一切，而且，

圣莫尼卡之景点 - SpeakingMax英语口语达人

Using the angle of the Sun, the team was able to estimate temperatures on Europa's surface.

BBC: Ice blades threaten Europa landing

The antibodies bind to the CTLA-4, found on a cell's surface, and shut off the brake.

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While the screen's surface is completely flat, the edges curve around gently, forming a rounded back.

ENGADGET: Nokia Lumia 620 review: precisely what an entry-level smartphone should be