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1·In theory it should be possible to distinguish between the 2 radiants.

理论上，区分这两个辐射点是可能的。

2·Especially, the history and status of meteoroid astronomy, the ground-based and space observations of meteoroid streams, the observed and theoretical radiants about meteor showers;

重点叙述流星天文学的历史与现状；流星群的地面和空间观测；流星雨观测和理论辐射点；