“土星”造句
天文学家们过去一直感到奇怪,为什么只有
土星有光环.
Astronomers used to ask why only Saturn has rings.
“
土星族”飞行器可以分为三类或三组.
The Saturn family of launch vehicles falls into three types or groups.
数值例子大多数取自“土星V”飞行器的研究.
Numerical examples are mostly taken from studies of the Saturn V vehicle.