土卫四

Tidal heating, such as from the resonance with Dione or from libration, would then have sustained these hot spots in the core until the present, and would power the current geological activity.

潮汐热如从与土卫四或天平共振，便拥有持续的核心，这些到现在的热点，并将权力现有的地质活动。

European Cassini spacecraft flew within 310 miles (500 kilometers) of the Dione's pale surface last week, showing it possessed a heavily cratered surface but no presence of an atmosphere.

上周美国－欧洲的卡西尼太空船飞离土卫四的苍白色表面310英里（500公里），显示它的表面有一个巨大的坑，并且没有大气的存在。

For example, Saturn's E ring reaches across a broad region that encompasses the satellites Mimas, Tethys , Dione and Rhea, peaking in brightness at the orbit of the smooth, icy moon Enceladus.

例如，土星的E环所跨过的一大片区域中，包含了土卫一、卫三、卫四与土卫五等卫星，亮度的最高峰就处于平滑冰冷的土卫二之轨道上。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。