太空探测器显示了一个覆盖着一层厚厚的冰的物体。

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

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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。

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

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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。

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

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