Like Europa, Enceladus has an undersurface ocean, kept liquid by Saturn's ferocious tides, which squeeze the moon as it orbits the planet.

像木卫二一样，土卫二也有一个地下海洋，土星凶猛的潮汐力在卫星公转时挤压它，使地下水保持着液态。

Io is riddled with volcanoes, and Europa has an undersurface ocean that is the object of intense study for scientists looking for life in space.

木卫一布满了火山，木卫二的地表下有海洋，它是为了寻找外星生命而被密集研究的对象。

Saturn has dozens of moons, including Titan, which is as big as Mercury and has a thick atmosphere and lakes of methane; and Enceladus which has an undersurface ocean and eruptions of water geysers.

土星有几十个卫星，包括土卫六，这颗大小如同水星、拥有厚厚的大气层和甲烷湖的卫星，和拥有地下海洋和间歇水喷泉的土卫二恩科拉多斯。