dual sources

• 两点源

dual sources的用法和样例：

例句

1. Also shown are huge clouds of multimillion degree gas and bright point like sources due to neutron stars and black holes.
   同样显现在其中的是巨大的气体云团，温度达几百万度，还有明亮的点源，这是由于中子星与黑洞造成的。
2. The distribution of non-point sources of pollution from different effluents had distinct spatial characteristics.
   各流域非点源污染的发生具有明显的地域分异特征。