这张由美国宇航局发布的图像显示了由于小月亮普罗米修斯影响，赫然显现的两个土星光环。
The effects of the small moon Prometheus loom large on two of Saturn's rings in this image released by NASA.
6月21日公布的卡西尼号飞船所拍摄的一张照片里，两个土星的卫星形成了鲜明的对比。
Two of Saturn's moons present a sharp contrast in a picture snapped by the Cassini spacecraft and released June 21.
尽管金星和水星没有卫星，火星却有两个卫星，更别提各有超过60个卫星的土星和木星。
While Venus and Mercury have no moons, Mars has two, while Saturn and Jupiter have more than 60 each.
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