n.木卫四（木星最亮的四颗卫星之一，是距木星第六远的卫星），卡利斯托（希腊神话中宙斯心爱的女神，被赫拉所憎恨并被她变为一只熊）

Callisto is the second-largest moon of Jupiter.
Callisto是木星的第二大的卫星。
The surface of Callisto is heavily cratered and shows signs of ancient geologic activity.
Callisto的表面布满了撞击坑，并显示出古代地质活动的迹象。
Scientists believe that beneath its icy crust, Callisto may have a subsurface ocean.
科学家认为，在其冰质地壳之下，Callisto可能有一个地下海洋。
The discovery of a magnetic field around Callisto suggests the presence of a metallic core.
发现在Callisto周围存在磁场表明可能存在一个金属核心。
Callisto's atmosphere is very thin, consisting mainly of carbon dioxide with some molecular oxygen.
Callisto的大气层非常稀薄，主要由二氧化碳组成，还有一些分子氧。
The study of Callisto helps us understand the history and evolution of the Jovian system.
对Callisto的研究有助于我们了解木星系统的形成和演化历史。
Callisto has been visited by several spacecraft, including Voyager 1 and 2, and Galileo.
Callisto已经被几个航天器访问过，包括旅行者1号和2号以及伽利略号。
The discovery of water ice on Callisto increases the possibility of finding extraterrestrial life in the future.
在Callisto上发现水冰增加了未来在其他星球上发现外星生命的可能性。
Callisto's distance from Jupiter makes it an ideal target for studying the effects of radiation on a celestial body.
Callisto距离木星较远，使其成为研究辐射对天体影响的理想目标。
The complex terrain of Callisto suggests that it has undergone significant geological changes over time.
Callisto复杂的地形表明它在过去经历了显著的地质变化。