Not only can scientists now identify what types of planets exist, they can see how common each type is, yielding clues into the enigmas of planetary formation.
现在科学家不仅能识别行星的存在形式，还能够了解每种类型的数量，找出行星构造之谜的线索。
2
Morris says this type of research is also important in understanding how planetary systems form in general.
Morris说这种类型的研究对理解行星形成的大体过程也是很重要的。
3
The type analysis of the cycloid steel ball planetary transmission is made.