Secondly they will have to make a reliable map of its surface.

其次，他们必须制作一张可靠的关于它表面的地图。

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Space probes have provided evidence that Europa has a large ocean under its surface.

太空探测器提供的证据表明，木卫二表面下有一个巨大的海洋。

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The probes have also made the scientists think that under its surface, Europa has a rocky core giving off volcanic heat.

这些探测器还让科学家们认为，在木卫二的表面之下，有一个释放出火山的热量的岩石内核。

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Scientists have long believed that Earth's satellite lacks the ability to hold water near its surface because it has no atmosphere.

VOA: special.2009.09.30

But at least at the beginning, when we approach the book, we should stay on its surface, not dig at least initially too deeply.

但至少在一开始，当我们着手阅读时，我们应该要停驻于其表面，不要一开始就深探。

耶鲁公开课 - 政治哲学导论课程节选

is very close to its surface a kind of anal-phase parable.

和那种肛门期的寓言很像。

耶鲁公开课 - 文学理论导论课程节选

Its surface is no more unpleasant than the inside of a volcanic vent, where bacteria thrive.

NEWYORKER: The Martian Chroniclers

On its surface, saving money for a long period of rainy days makes sense.

FORBES: Written by By Drew Hofler

Any particle with a target molecule on its surface will stick to the spin valve.

ECONOMIST: Labs on a chip