ovals of Cassini

例句：

1. 1. The ovals of Cassini are the first to study Jupiter's atmosphere.
   卡西尼的卫星是第一个研究木星大气的。
2. 2. The ovals orbit Jupiter at a distance of about 50 million miles.
   卫星绕木星运行的距离约为5亿英里。
3. 3. The ovals have been studying the planet's magnetic field for years.
   卫星已经研究了这颗行星几年的磁场。