Europa

Petra trawled the aisles of the Europa supermarket.

佩特拉搜索了欧罗巴超市的各个通道。

One place scientists are studying very closely is Europa, a moon of Jupiter.

科学家们正在仔细研究木卫二，它是木星的卫星。

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。

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。

As Europa orbits its planet, however, it flexes due to the gravitational tug-of-war between it, its sister moons, and Jupiter.

然而，当木卫二绕其行星运行时，由于姊妹卫星和木星之间的引力拉锯战，它会弯曲。